Manifestation of armed power (6)
I believe the answer is:
biceps
'manifestation of armed power' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
This is the entire clue.
Can you help me to learn more?
(Other definitions for biceps that I've seen before include "Flexor muscle" , "Arm workers" , "Arm muscles" , "Elbow-bending muscle" , "Muscle that flexes the forearm" .)