Fish? Record catching nothing (3)
I believe the answer is:
cod
'fish?' is the definition.
(type of fish)
'record catching nothing' is the wordplay.
'record' becomes 'cd' (compact disc).
'catching' is an insertion indicator.
'nothing' becomes 'O' (looks like zero - 0).
'cd' enclosing 'o' is 'COD'.
(Other definitions for cod that I've seen before include "No payment in advance" , "A joke of a fish?" , "Cash on delivery for hoax" , "A white fish" , "North Atlantic fish" .)