Burrito alternative (4)
I believe the answer is:
taco
'burrito alternative' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for taco that I've seen before include "Coat with Mexican dish" , "Folded and filled tortilla" , "Filled rolled tortilla" , "Mexican rolled pancake with a filling" , "Mexican filled tortilla" .)