Cheapskate eats no meat at first — Bombay duck for instance (8)
I believe the answer is:
misnomer
'bombay duck for instance' is the definition.
('Bombay duck' is a misnomer - it's actually a fish)
'cheapskate eats no meat at first' is the wordplay.
'cheapskate' becomes 'miser' (cheapskate can mean a miserly person).
'eats' is an insertion indicator.
'at first' says to take the initial letters.
The first letter of 'meat' is 'm'.
'no'+'m'='nom'
'miser' enclosing 'nom' is 'MISNOMER'.
(Other definitions for misnomer that I've seen before include "Wrong name or description" , "Inapt term" , "wrong title" , "Is Norm me? (anag)" , "the label's wrong" .)