Risk associated with fish shop (6)
I believe the answer is:
betray
'shop' is the definition.
(I know that shop can be written as betray)
'risk associated with fish' is the wordplay.
'risk' becomes 'bet' (I've seen this in another clue).
'associated with' says to put letters next to each other.
'fish' becomes 'ray' (ray is a kind of fish).
'bet'+'ray'='BETRAY'
(Other definitions for betray that I've seen before include "Be a traitor" , "shop" , "Break confidence" , "Sell down the river" , "Cheat on" .)