Light informal meals (6)
I believe the answer is:
snacks
'light informal meals' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for snacks that I've seen before include "Light bites such as crisps" , "Light informal meals" , "Small food amounts between main meals" , "Small or casual meals, often hurried" , "Nibbles" .)