Failing to push for result (6)
I believe the answer is:
upshot
'for result' is the definition.
(synonyms)
'failing to push' is the wordplay.
'failing' indicates an anagram.
'to'+'push'='topush'
'topush' with letters rearranged gives 'UPSHOT'.
(Other definitions for upshot that I've seen before include "Outcome, consequence" , "skier" , "One killed the albatross" , "Eventual outcome or conclusion" , "Outcome of vertical discharge?" .)