Rush, heading off for spicy dish (5)
I believe the answer is:
curry
'spicy dish' is the definition.
(I've seen this before)
'rush heading off' is the wordplay.
'rush' becomes 'scurry' (scurry is a kind of rush).
'heading off' means to remove the first letter.
'scurry' with its initial letter taken off is 'CURRY'.
'for' acts as a link.
(Other definitions for curry that I've seen before include "Indian-style dish" , "Scratch" , "Dress leather" , "Pungent Indian dish" , "Hot spicy dish" .)