Sauce for gnocchi (5)
I believe the answer is:
pesto
'sauce for gnocchi' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for pesto that I've seen before include "sauce involving Basil" , "Saucy work" , "Ligurian food" , "Basic sauce" , "Pasta sauce based on basil" .)