Tortilla chips topped with cheese and chilli (6)
I believe the answer is:
nachos
'tortilla chips topped with cheese and chilli' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for nachos that I've seen before include "Snack" , "Tortilla chips topped with cheese and chilli" , "Mexican chips" , "Mexican crisps" , "Type of Mexican food" .)