Sir sent back German dish (7)
I believe the answer is:
risotto
'dish' is the definition.
(risotto is a kind of dish)
'sir sent back german' is the wordplay.
'sent back' shows that the letters should be reversed in order.
'german' becomes 'otto' (I've seen this before).
'sir' back-to-front is 'ris'.
'ris'+'otto'='RISOTTO'
(Other definitions for risotto that I've seen before include "Savoury rice dish" , "F" , "Italian course" , "scoff" , "Italian dish of rice, meat and vegetables" .)