To push for an outcome (6)
I believe the answer is:
upshot
'an outcome' is the definition.
('upshot' can be a synonym of 'outcome')
'to push' is the wordplay.
'to push' anagrams to 'UPSHOT'.
But, I am not sure how this is indicated.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for upshot that I've seen before include "anti-aircraft fire?" , "skier" , "One killed the albatross" , "increased exposure" , "Outcome, final result" .)