1: Adore inconstant nymph (5)
2: Headless rodent left by bird (5)
3: If forced, see idle TV broadcast (9)
4: In no state to contain a pregnant virgin? (3)
5: Sounds like a bright child (3).
9: Hazardous emanation from river used by a crime boss (5)
10: Ms. Messing to remove underwear? (5)
11: Essential part of Cayce's power! (3)
12: Bounder beheaded by slippery swimmer (3)