Fish and chopped nut served on ice (4,6)
I believe the answer is:
rock salmon
'fish' is the definition.
(I know that rock salmon is a type of fish)
'chopped nut served on ice' is the wordplay.
'chopped' means to remove the last letter.
'nut' becomes 'almond' (almond is a type of nut).
'served on' means one lot of letters go next to another.
'ice' becomes 'rocks' (both can informally mean diamonds).
'almond' with its last letter taken off is 'almon'.
'almon' after 'rocks' is 'ROCK-SALMON'.
'and' acts as a link.
(Other definitions for rock salmon that I've seen before include "Fish" , "Catfish as food" , "swimmer" , "Dogfish as food" .)