Mention fastener by one's ear? (6)
I believe the answer is:
broach
'mention' is the definition.
(thesaurus)
'fastener by one's ear?' is the wordplay.
I cannot quite see how this works, but
'one' could be 'a' (a thing is one thing) and 'a' is present in the answer.
The remaining letters 'broch' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for broach that I've seen before include "crack" , "Hint" , "Raise (a sensitive subject)" , "Raise (a sensitive topic)" , "Raise a topic for discussion" .)