Everybody said it’s a boring thing (3)
I believe the answer is:
awl
'a boring thing' is the definition.
(tool for boring holes)
'everybody said' is the wordplay.
'everybody' becomes 'all' (I've seen this before).
'said' shows a homophone (sound like).
'all' is a homophone of 'AWL'.
'it's' is the link.
(Other definitions for awl that I've seen before include "a boring person may need?" , "Hole-boring tool" , "Pointed tool used in leatherwork" , "Boring tool sounds comprehensive" , "Cobbler's tool" .)