ACROSS 1 Jump in episodes of hilarity at run-down cinemas (8) 5 Bloke hailed in hot spring (6) 10 IRA test run by pretentious performer (7) 11 Cut poor pattern into rock that’s showing (7) 12 Being hot-headed with first car may lead to collision (5) 13 Injury received by journalist, they say, was just the usual stuff (9) 14 It may support broken leg sustained in defeat of Trojan prince (7,2,5) 17 Starts each roll with gusto in seat at front of theatre (9,5) 21 Tolerance that brought down a wall, once (9) 23 Hurry, as the units are assembling (5) 24 Be sick of Australia in extreme crunch down under (7) 25 Standard oil collected by reproducers of woodlice, etc (7) 26 He’s joined commandos to get symbols of rank (6) 27 This unwelcome driver may give political support (8) DOWN 1 Father managed firm for Spanish dictator (6) 2 Real tin used in repair of gut (7) 3 Job gets the heartless treatment very quickly (9) 4 Train that went to Yuma, or Sunday one, taken by popular singers (3,5,6) 6 Conquered, beheaded and cannibalised? (5) 7 Hose rose lends appeal to last of roses (7) 8 Parties gathered round Democrat are most extreme of 3 (8) 9 Is Obama equal to the BBC World Service? (5,2,7) 15 Farmer’s tool used for tuning instruments, you would think (9) 16 Rulers put bridge through WWI battlefield (8) 18 Blushes to show true character (7) 19 Note’s sound is the ultimate (4,3) 20 Plants computers in restricted accommodation (6) 22 Getting paired up for example could be source of division (5)