Part of a useful name for the forearm (4)
I believe the answer is:
ulna
'forearm' is the definition.
The answer and definition can be both body parts as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'part of a useful name for' is the wordplay.
'part of' indicates the answer is hidden within the clue.
'ULNA' can be found hidden inside 'useful name for'.
'the' is the link.
Can you help me to learn more?
(Other definitions for ulna that I've seen before include "a section of framework" , "The longer and inner bone in forearm" , "One of two bones of the forearm" , "Thinner of two long bones in forearm" , "Long bone in the arm" .)