Leave a boxing match or circulate (2,5)
I believe the answer is:
go about
'circulate' is the definition.
(thesaurus)
'leave a boxing match' is the wordplay.
'leave' becomes 'go'.
'boxing match' becomes 'bout' (I've seen this before).
'go'+'a'+'bout'='GO ABOUT'
'or' acts as a link.
(Other definitions for go about that I've seen before include "Begin to deal with" , "Approach" , "turn at sea" , "(Of ship) change course" .)