An act to go for? (4)
I believe the answer is:
turn
This might be a double definition.
'an act' is the first definition.
(turn is a kind of act)
'go for?' is the second definition.
'turn' can be an answer for 'go' (turning is a kind of going). I am not sure about the 'for?' bit.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for turn that I've seen before include "Go - go round in circles - go off" , "Rotate - diverge - change" , "fit" , "Revolve; act" , "change for Autumn" .)