Muscular upper members have them (6)
I believe the answer is:
biceps
'muscular upper' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for biceps that I've seen before include "I bend the elbow" , "Upper-arm muscle" , "Weightlifters use them" , "One operating arm" , "Flexor muscle" .)
