Arm flexor (6)
I believe the answer is:
biceps
(Other definitions for biceps that I've seen before include "One operating arm" , "Flexor muscle" , "Upper-arm muscle" , "Elbow-bending muscle" , "Arm workers" .)
I believe the answer is:
biceps
(Other definitions for biceps that I've seen before include "One operating arm" , "Flexor muscle" , "Upper-arm muscle" , "Elbow-bending muscle" , "Arm workers" .)