Spicy food husband put in one box, travelling north (5)
I believe the answer is:
bhaji
'spicy food' is the definition.
'husband put in one box travelling north' is the wordplay.
'husband' becomes 'h'.
'put in' indicates putting letters inside.
'one' becomes 'I' (Roman numeral).
'box' becomes 'jab' (punch).
'travelling north' says the letters should be written backwards (in a down clue, letters go up).
'i'+'jab'='ijab'
'h' put inside 'ijab' is 'ijahb'.
'ijahb' back-to-front is 'BHAJI'.
(Other definitions for bhaji that I've seen before include "Deep-fried Indian vegetable dish" , "Fried ball of vegetables" , "> cake" , "Indian dish consisting of vegetables deep fried in batter" , "fare" .)