Nifty cooking with fish finger (8)
I believe the answer is:
identify
'finger' is the definition.
(I've seen this in another clue)
'nifty cooking with fish' is the wordplay.
'cooking' indicates an anagram (letters cooked up into a new form).
'with' is an insertion indicator.
'fish' becomes 'ide' (type of fish).
'nifty' with letters rearranged gives 'ntify'.
'ntify' going around 'ide' is 'IDENTIFY'.
(Other definitions for identify that I've seen before include "Recognise as specific person or thing" , "associate" , "Empathise" , "Pinpoint" , "Point out" .)