1: The huntress about to be put in the Labyrinth to find the source of the thread. (7)
2: Finish suddenly, like an oboe? (1, 4, 2, 3, 3)
3: Arena performer's damage involving time and trouble (7)
5: To implicate is innate, swallowing a hundred backing Space Station One (11)
6: Thirteenth in a series, ER's about an Aussie racketeer who took repeated slams? (7)
9: Mousy girlfriend loses head and bellybutton (5)
10: Unfortunate rot in republic is everlasting (13)
12: Enticements disrupt mental rules (11)
17: Unfavourable publicity given to metrical composition (7)
18: Fill-in professional almost rewrote the column (5)
20: Text, Inc., bankrupted, is gone (7)
21: Doctor urges: 'Remove Roy's heart in operation' (7)
25: Call for help oddly stops (3)