Ham is regularly stir-fried in Japanese dish (7)
I believe the answer is:
sashimi
'japanese dish' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for sashimi that I've seen before include "foreign dish" , "Japanese dish of thinly sliced raw fish" , "Japanese raw fish - I'm as his (anag)" , "Something of chef's" , "fish food?" .)