Sherry that goes with portion of fish and duck (4)
I believe the answer is:
fino
'sherry that goes' is the definition.
'fino' can be an answer for 'sherry' (I've seen this before). I am not sure about the remainder of the definition.
'with portion of fish and duck' is the wordplay.
'with' says to put letters next to each other.
'portion of fish' becomes 'fi' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'and' becomes 'n' (common abbreviation for 'and').
'duck' becomes 'o'.
'fi' put next to 'n' is 'fin'.
'fin'+'o'='FINO'
Can you help me to learn more?
(Other definitions for fino that I've seen before include "Dry Spanish sherry" , "Type of sherry" , "Light-coloured sherry" , "Light dry sherry" , "Bone dry sherry, served chilled" .)