Dish is buried in cave, lid off (7)
I believe the answer is:
risotto
'dish' is the definition.
(risotto is a kind of dish)
'is buried in cave lid off' is the wordplay.
'buried in' indicates putting letters inside (inserted letters get buried).
'cave' becomes 'grotto' (grotto is a kind of cave).
'lid off' means to remove the first letter (in a down clue, lid can mean the top letter).
'grotto' with its first letter removed is 'rotto'.
'is' going within 'rotto' is 'RISOTTO'.
(Other definitions for risotto that I've seen before include "Savoury rice dish" , "You cook it in stock" , "Italian dish of rice, meat and vegetables" , "dishy thing!" , "Main course" .)