Snack that cook occasionally provides (4)
I believe the answer is:
taco
'snack' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for taco that I've seen before include "Folded and filled tortilla" , "quick dish" , "Tortilla with savoury filling" , "Mexican food" , "Mexican dish of rolled tortilla with filling" .)