Take off a ring, we hear (4)
I believe the answer is:
peel
'take off' is the definition.
(thesaurus)
'a ring we hear' is the wordplay.
'a ring' becomes 'peal' (I've seen this before).
'we hear' indicates a 'sounds like' (homophone) clue.
'peal' is a homophone of 'PEEL'.
(Other definitions for peel that I've seen before include "Lemon skin" , "Strip; rind" , "zest, getting out of this scrape?" , "Remove the rind" , "See 4 and 22" .)