Serves up Mexican dish in the foreign place (6)
I believe the answer is:
locate
'place' is the definition.
('locate' can be a synonym of 'place')
'serves up mexican dish in the foreign' is the wordplay.
'serves up' is a reversal indicator.
'mexican dish' becomes 'taco' (I've seen this before).
'in' means one lot of letters goes inside another.
'the foreign' becomes 'el'.
'taco' put within 'el' is 'etacol'.
'etacol' written backwards gives 'LOCATE'.
(Other definitions for locate that I've seen before include "Find, or establish in particular place" , "Place, situate" , "Track down" , "Discover the place where something is" , "Put in place" .)