At the club, are they all arms and legs? (7)
I believe the answer is:
members
'legs?' is the definition.
(leg is a kind of member)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for members that I've seen before include "Joiners" , "People belonging" , "Parliamentarians" , "structural beams?" , "body..." .)