Try for a pin (7)
I believe the answer is:
wrestle
'try for a pin' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for wrestle that I've seen before include "Tussle" , "Struggle, grapple" , "Grapple on canvas" , "Fight - get to grips (with)" , "Struggle (with a difficult problem)" .)