Be willing to conform (5)
I believe the answer is:
agree
I believe this clue is a double definition.
'be willing' is the first definition.
(thesaurus)
'conform' is the second definition.
(I've seen this in another clue)
'to' acts as a link.
(Other definitions for agree that I've seen before include "Concur - correspond" , "Accept" , "confess?" , "Square" , "Allow" .)