Across:
1 Be on the safe side (SECURE) with breakdown (= anagram indicator) rescue (rescue = SECURE),
4 Time off in the plantation perhaps (TEA BREAK) for the rest of the brewers (TEA BREAK),
9 Out (ASLEEP) of tin? There’s none in Palestine! (no ‘tin’ in ‘Palestine’ = palese = ASLEEP),
10 Checks out The Hearing (OTOSCOPE) with old (O-) Count (count = tot) briefly (t) (‘tot’ without ‘t’ = -TO-) where there’s capacity (-SCOPE) (OTOSCOPE),
12 Touches down (LANDS-) in South Africa (-CAPE) (LANDSCAPE) to organise a plot (LANDSCAPE),
13 Some German villain (some ‘German villain’ = ANVIL) gets hammered (ANVIL),
14 Could have forecasted this (WEATHER-) was created by a philosopher (-PROOF) (WEATHERPROOF) keeping some elements out of The House (WEATHERPROOF),
18 Determines the age of sample (CARBON DATING) of diamonds (CARBON) for couple going steady (DATING) (CARBON DATING),
21 Make use of (AVAIL) a (A-) sign (victory sign = -V- sign) on the house (The House = Dáil) starting off (d) (‘Dáil’ without ‘d’ = -AIL) (AVAIL),
22 Merry (EXUBERANT) from bubbly? (EXUBERANT),
24 Outlaw (RENEGADE) from Spain (-E-) found in garden (garden = REN-GAD-) working (= anagram indicator) at back of the terrace (at back of the ‘terrace’ = -E) (RENEGADE),
25 Who’s a pretty boy then? (PARROT) Who’s a pretty boy then? (said twice = imitate/repeat = PARROT),
26 Lawyer (Senior Council = SC-) has right (-R-) to breakdown (= anagram indicator) Cathy (Cathy = -ATCHY) (SCRATCHY), causing friction, for the record (friction/noise on the record/LP = SCRATCHY),
27 Show up (ATTEND) to lure out of laundrette (‘lure’ out of ‘laundrette’ = andtte = ATTEND).
Down:
1 Point-to-point (south + west = SW-) permits (-ALLOWS) (SWALLOWS) high flyers (SWALLOWS),
2 Officer (colonel = COL-) starting out (starting ‘out’ = -O-) rested (rested = lain = -NIAL) up (= reversal indicator) (COLONIAL) in settler’s house (COLONIAL house),
3 Part of the orchestra (wind instruments = REEDS) turns up (= reversal indicator) sound from the start (‘sound’ from the start = -S) on stag (deer = REED-) (REEDS),
5 Parisian business person (Parisian/French “business person” = ENTREPRENEUR) produces The Hustler (ENTREPRENEUR),
6 Top person in office with responsibility (BOSS-) for leader at (leader ‘at’ = -A) The Star (NOVA) (BOSSA NOVA) is a musical type from Brazil (BOSSA NOVA),
7 Make progress (EVOLVE) in Spain (E-), love (love = -VOL-E) sick (= anagram indicator) over Victor (-V-) (EVOLVE),
8 Eagerly (KEENLY) digs up (= reversal indicator) yard (-Y) for one of the vegetables (leek = KEE-L-) around end of the garden (end of the ‘garden’ = -N-) (KEENLY),
11 Little space between two parts (HAIR’S BREADTH) of locks (HAIRS) for feeding the ducks (BREAD-) on a fair amount of (half of) the path (half of the ‘path’ = -TH) (HAIR’S BREADTH),
15 For those in golf (HEADLIGHT on VW Golf car), the captain (HEAD-) can be a source of illumination (-LIGHT) (HEADLIGHT),
16 Detectives (detectives = DIs = DIS-) work out (-AGREE) (DISAGREE) how to cross Swords (cross swords = DISAGREE),
17 A (A-) soldier (-GI-) from leaderless (s) country (‘state’ without ‘s’ = -TATE-) finds diamonds (-D) (AGITATED) and gets jittery (AGITATED),
19 Bill (law = WAL-) goes back (= reversal indicator) to cut (t) reddish-brown (‘rust’ without ‘t’ = -RUS) (WALRUS) type of facial hair (WALRUS moustache),
20 Employee (EARNER) takes dogs out of rose garden (takes ‘dogs’ out of ‘rose garden’ = rearen = EARNER),
23 Cancel (axe = EXA-) review (= reversal indicator) by court (-CT) (EXACT) on the money (EXACT).