Try to follow happy result (6)
I believe the answer is:
upshot
'result' is the definition.
('upshot' can be a synonym of 'result')
'try to follow happy' is the wordplay.
'try' becomes 'shot' (shot is a kind of try**).
'to follow' is a charade indicator (letters next to each other).
'happy' becomes 'up' (I've seen this in other clues).
'shot' put after 'up' is 'UPSHOT'.
(Other definitions for upshot that I've seen before include "One killed the albatross" , "Outcome of vertical discharge?" , "increased exposure" , "issue" , "Outcome, final result" .)