1: Random, visceral troop of hunters - that may open a door for you? (13)
2: Deviant animals mutated to this creature (9,5)
3: Some doctors oust head of Johnson and Johnson? (9)
4: Refusals thwarted goons (2-3)
6: Blunder into tall African mammal, with no infrared (5)
7: Great tax year after new condition (5)
9: Trips around Central Europe for arms parts (6)
11: 'Ransom'? Lame. Run 'Rocky I', 'II', 'III', etc. (5,8)
14: Distended, having bolted a stew (7)
15: This behaviour causes sin! (9)
16: Evita Peron endlessly tortured spy (9)
19: Uncharacteristically, Dickenson pens uplifting romantic ballad (5)
20: The end of some rivers is oddly deep, lethal (5)
21: Small courses, no fine trimmings. (5)