Food for a violinist, partly (7)
I believe the answer is:
ravioli
'food' is the definition.
(ravioli is a kind of food)
'for a violinist partly' is the wordplay.
'partly' says the answer is hidden in the clue (part of the clue is used).
'RAVIOLI' can be found hidden inside 'for a violinist'.
(Other definitions for ravioli that I've seen before include "Small stuffed pasta" , "Pasta pillows" , "Fare" , "Italian food" , "stuffed envelopes to eat" .)