Big cheese sandwich on chorizo wraps (6)
I believe the answer is:
honcho
'big cheese' is the definition.
(I've seen this in another clue)
'sandwich on chorizo wraps' is the wordplay.
'wraps' indicates the answer is hidden within the clue (wrap can mean cover or conceal).
'HONCHO' is hidden in the letters of 'sandwich on chorizo'.
(Other definitions for honcho that I've seen before include "governor" , "Leader (US slang)" .)