About to go for a ticket (6)
I believe the answer is:
return
'a ticket' is the definition.
(return ticket is a kind of ticket)
'about to go' is the wordplay.
'about' becomes 're' (common abbreviation for 'with reference to').
'to go' becomes 'turn' (turning is a kind of going).
're'+'turn'='RETURN'
'for' is the link.
(Other definitions for return that I've seen before include "Come/go back" , "Take back" , "answer" , "Two-way ticket" , "Go/come back" .)