Film fan's crunchy snack? (6,3)
I believe the answer is:
brazil nut
'crunchy snack?' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'film fan's' is the wordplay.
'film' becomes 'brazil' (I am not sure about this - if you are sure you should believe this answer much more).
'fan' becomes 'nut' (both can mean an enthusiast).
'brazil'+'nut'='BRAZIL NUT'
Can you help me to learn more?
(Other definitions for brazil nut that I've seen before include "that's hard to crack?" , "source of protein" , "Hard thing" , "it's hard to swallow" , "Fruit with a shell - run a blitz (anag)" .)