Light meals for about a pound (5)
I believe the answer is:
flare
'light' is the definition.
(thesaurus)
'meals for about a pound' is the wordplay.
'meals for' becomes 'fare' (I am not sure about this - if you are sure you should believe this answer much more).
'about' indicates putting letters inside.
'a pound' becomes 'l'.
'fare' placed around 'l' is 'FLARE'.
Can you help me to learn more?
(Other definitions for flare that I've seen before include "Blaze; distress signal" , "Burst into sudden activity or anger" , "signalling light" , "Warning light" , "Spread" .)