Container with hamper gives protection for food (7)
I believe the answer is:
tinfoil
'protection for food' is the definition.
(tinfoil might be used to cover food)
'container with hamper' is the wordplay.
'container' becomes 'tin' (tin is a kind of container).
'with' is a charade indicator (letters next to each other).
'hamper' becomes 'foil' (foil can mean to hamper or thwart something).
'tin'+'foil'='TINFOIL'
'gives' acts as a link.
(Other definitions for tinfoil that I've seen before include "This coverage" , "Kitchen item" , "Wrapping around food" , "Rolled metal" , "A help in the kitchen" .)