4 across
Dish
of
unusual
grain
(7)
Dish of unusual grain (7)
hints
0
checks
0
hints
The definition is at the beginning of the clue.
How the clue works
See Dish there — that's your definition, pointing to the cheese dish rarebit. Then it's built from two bits: RARE meaning unusual, followed by BIT meaning a grain or small amount, giving you the whole thing.