Berliner's occasional snack in Paris (4)
I believe the answer is:
brie
'snack in paris' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'berliner's occasional' is the wordplay.
'occasional' means one should take alternating letters (letters taken at regular intervals or on occasion).
The alternate letters of 'berliner' are 'BRIE'.
Can you help me to learn more?
(Other definitions for brie that I've seen before include "cheesy stuff" , "Prov. squalid place" , "Bergamot-flavoured tea" , "cheese-producing region" , "Round soft Fr. cheese" .)