Something to eat in Barcelona — chorizo? (5)
I believe the answer is:
nacho
'something to eat' is the definition.
(nacho is a kind of food)
'in barcelona chorizo?' is the wordplay.
'in' indicates the answer is hidden within the clue.
'NACHO' is hidden in the letters of 'barcelona chorizo'.
(Other definitions for nacho that I've seen before include "Foreign fare" , "kind of chip" , "Nibble" , "Mex. corn chip" , "chip production line unit" .)