Fish or game? (8)
I believe the answer is:
sardines
This clue is a double definition.
'fish' is the first definition.
(I've seen this before)
'game?' is the second definition.
(sardines is a hiding game)
'or' acts as a link.
(Other definitions for sardines that I've seen before include "Small fish, usually canned" , "Squash-together party game" , "Cumulative hiding game" , "Aridness of small fish" , "Children's game - fish" .)