Coffee with dish, unlimited (5)
I believe the answer is:
latte
'coffee' is the definition.
(I've seen this before)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for latte that I've seen before include "Espresso added to frothed steamed milk" , "See 21" , "Style of coffee" , "Espresso with frothy milk" , "coffee production" .)