Family disposing of large container (3)
I believe the answer is:
can
'container' is the definition.
(can is a kind of container)
'family disposing of large' is the wordplay.
'family' becomes 'clan' (clan can mean a large family).
'disposing of' suggests deleting specific letters.
'large' becomes 'L' (eg in clothes sizes).
'clan' with 'l' removed is 'CAN'.
(Other definitions for can that I've seen before include "Billy" , "Cooler" , "let go in the US" , "toilet" , "Tin; be able to" .)