Begin to fix a fight, perhaps (3,5)
I believe the answer is:
set about
'begin' is the definition.
(synonyms)
'fix a fight perhaps' is the wordplay.
'fix' becomes 'set' (synonyms).
'fight perhaps' becomes 'bout' (as in a bout in boxing. I am not sure about the 'perhaps' bit.).
'set'+'a'+'bout'='SET ABOUT'
'to' is the link.
Can you help me to learn more?
(Other definitions for set about that I've seen before include "Start to do something with determination" , "Begin - attack" , "Get cracking" , "Embark upon" .)