1 down
Mexican
snack
stack
–
hot,
without
any
wrappers
(4)
Mexican snack stack – hot, without any wrappers (4)
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The definition is at the beginning of the clue.
How the clue works
Right, so Mexican snack is the definition, pointing you to a taco. Now take "stack" and "hot" and strip off their outer letters, since they've lost their "wrappers" – "stack" loses its s and k to leave TAC, and "hot" loses its h and t to leave O. Stick those together, TAC plus O, and you've got your answer.