What Gollum did in fight scene? (5,4)
I believe the answer is:
prize ring
'fight scene?' is the definition.
(location for a prize fight boxing match)
'what gollum did in' is the wordplay.
I cannot quite see how this works, but
'in' is present in the answer.
This explanation may well be incorrect...
(Other definitions for prize ring that I've seen before include "boxing" , "opponents boxed in here" , "Fight Club venue?" .)