Dress at about one for Italian food (8)
I believe the answer is:
rigatoni
'italian food' is the definition.
(type of pasta)
'dress at about one' is the wordplay.
'dress' becomes 'rig' (rig is a kind of dress).
'about one' becomes 'oni' (I can't explain this - if you can you should give a lot more credence to this answer).
'rig'+'at'+'oni'='RIGATONI'
'for' is the link.
(Other definitions for rigatoni that I've seen before include "Pasta dish" , "Pasta; at origin (anag.)" , "Short, ribbed, tubular pasta" , "Form of pasta" , "Pasta - I got rain (anag)" .)