Member of a body (4)
I believe the answer is:
limb
'member' is the definition.
(member can mean a limb)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for limb that I've seen before include "Jointed appendage" , "Wing, perhaps" , "Branch of a tree (risky to go out on)" , "as part of plane, say" , "Branch - arm - leg" .)