Behind everybody, nevertheless (5,3)
I believe the answer is:
after all
'nevertheless' is the definition.
(after all can mean nevertheless)
'behind everybody' is the wordplay.
'behind' becomes 'after' (I've seen this before).
'everybody' becomes 'all' (I've seen this before).
'after'+'all'='AFTER ALL'
(Other definitions for after all that I've seen before include "I mean, when everything's said and done" , "at the end of the day" , "when push comes to shove" , "'In spite of what's been said and done (5,3)'" , "most importantly" .)