This bores everyone in conversation (3)
I believe the answer is:
awl
'this bores' is the definition.
The definition suggests a singular noun which matches the answer.
'everyone in conversation' is the wordplay.
'everyone' becomes 'all' (all people).
'in conversation' shows a homophone (sound like).
'all' sounds like 'AWL'.
Can you help me to learn more?
(Other definitions for awl that I've seen before include "scribe" , "Pointed tool for punching holes" , "Borer, sounds like everything" , "A boring thing" , "Shoemaker's tool" .)