It sounds like everything a cobbler needs (3)
I believe the answer is:
awl
'a cobbler needs' is the definition.
(tool used by a cobbler)
'it sounds like everything' is the wordplay.
'it sounds like' indicates a 'sounds like' (homophone) clue.
'everything' becomes 'all' (all things).
'all' sounds like 'AWL'.
(Other definitions for awl that I've seen before include "a boring person needs" , "Pointed tool for making small holes" , "Hole-piercing tool" , "Tool for hole making" , "Hide sticker" .)