Whip messing up recount (7)
I believe the answer is:
trounce
'whip' is the definition.
(synonyms)
'messing up recount' is the wordplay.
'messing up' indicates an anagram (I've seen 'messed up' mean this).
'recount' anagrammed gives 'TROUNCE'.
(Other definitions for trounce that I've seen before include "Destroy" , "Beat thoroughly on recount" , "Defeat heavily in recount" , "Lick" , "Aged skip" .)