Go for a try (7)
I believe the answer is:
attempt
This clue is a double definition.
'go' is the first definition.
(thesaurus)
'a try' is the second definition.
('attempt' can be a synonym of 'try')
'for' acts as a link.
(Other definitions for attempt that I've seen before include "Effort; go" , "Have a crack" , "Try, endeavour" , "Stab" , "Try to climb (a peak)" .)