In spite of what's been said and done (5,3)
I believe the answer is:
after all
'in spite of what's been said and done' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for after all that I've seen before include "In spite of any indications to the contrary" , "anyway" , "Taking everything into account" , "Despite expectations to the contrary" , "'In spite of what's been said and done (5,3)'" .)