Ziti, for one (5)
I believe the answer is:
pasta
'ziti for one' is the definition.
(ziti is a kind of pasta)
This is the entire clue.
(Other definitions for pasta that I've seen before include "Spaghetti, orzo etc" , "Staple Italian food base" , "dish that's Italian" , "Penne, rigatoni etc" , "Eg, tagliatelle" .)