Arm muscle (6)
'arm muscle' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for biceps that I've seen before include "I bend the elbow" , "Arm workers" , "Upper-arm muscle" , "Flexor muscle" , "Contractor" .)
'arm muscle' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for triceps that I've seen before include "Muscles" , "Extensor muscle" , "Green citrus fruit" , "Muscle that extends the forearm" , "One stretches out an arm!" .)