Ring concerning first annulment (6)
I believe the answer is:
repeal
'annulment' is the definition.
(synonyms)
'ring concerning first' is the wordplay.
'ring' becomes 'peal' (pealing is a kind of ringing).
'concerning' becomes 're' (both can mean on a particular topic).
'first' says to put letters next to each other.
'peal' after 're' is 'REPEAL'.
(Other definitions for repeal that I've seen before include "Countermand" , "Withdraw law officially" , "Annul an act of parliament" , "Annul, rescind" , "Abrogate" .)