Villain’s head framed by a circle roughly around the neck? (8)

I haven't cracked this one yet — but the brilliant team at Fifteensquared have:

Villain’s head framed by a circle, roughly, around the neck? V <illian> (“head” means first letter only) in *(A CIRCLE); “roughly” is anagram indicator; cervical means to do with the neck, including that of the womb, hence “around the neck”