Kidnapper's muscle (8)
I believe the answer is:
abductor
This clue is a double definition.
'kidnapper's' is the first definition.
(synonyms)
'muscle' is the second definition.
(abductor muscle is a kind of muscle)
(Other definitions for abductor that I've seen before include "Taker (of someone)" , "Paris, for example" , "Person snatching, eg, a child" , "Muscle" , "Kidnapper" .)