Work over, provided with a dish of porridge (7)
I believe the answer is:
polenta
'dish of porridge' is the definition.
(Italian porridge dish)
'work over provided with a' is the wordplay.
'work' becomes 'op' (common abbreviation for 'opus').
'over' shows that the letters should be reversed in order.
'provided with' becomes 'lent' (I've seen this in other clues. I am not sure about the 'with' bit.).
'op' written backwards gives 'po'.
'po'+'lent'+'a'='POLENTA'
(Other definitions for polenta that I've seen before include "Italian boiled cornmeal" , "Italian food" , "Maize flour dough" , "Italian maize dough" , "(Dough made with) cornmeal" .)