Ruined China deal for Mexican food? (9)
I believe the answer is:
enchilada
'mexican food?' is the definition.
(I've seen this before)
'ruined china deal' is the wordplay.
'ruined' indicates anagramming the letters.
'china'+'deal'='chinadeal'
'chinadeal' with letters rearranged gives 'ENCHILADA'.
'for' is the link.
(Other definitions for enchilada that I've seen before include "Mexican food" , "Mexican tortilla with chilli" , "The whole ___ -- everything (US)" , "Tortilla with meat and chilli" , "Rolled stuffed tortilla with chilli sauce" .)