If its end became soft, would it go limp? (4)
I believe the answer is:
limb
'limp?' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for limb that I've seen before include "Large tree branch" , "as part of plane, say" , "Tentacle" , "Wing, perhaps" , "Jointed appendage" .)