Accuse them if prepared to accept consequences (4,3,5)
I believe the answer is:
face the music
'accept consequences' is the definition.
'accuse them if prepared' is the wordplay.
'prepared' indicates anagramming the letters.
'accuse'+'them'+'if'='accusethemif'
'accusethemif' is an anagram of 'FACE THE MUSIC'.
'to' is the link.
(Other definitions for face the music that I've seen before include "Accept criticism" , "brave encounter" , "Confront unpleasant consequences" , "Brave a hostile situation" , "Take responsibility" .)