On plate, special Italian dish (7)
I believe the answer is:
polenta
'italian dish' is the definition.
(I've seen this before)
'on plate special' is the wordplay.
'special' indicates an anagram.
'on'+'plate'='onplate'
'onplate' with letters rearranged gives 'POLENTA'.
(Other definitions for polenta that I've seen before include "Cooked meal" , "Italian dish of maize flour" , "Fine yellow cornmeal" , "Cornmeal -- on plate (anag)" , "Italian maize paste" .)