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' is a deletion indicator.
'large' becomes 'L' (eg in clothes sizes).
'clan' with 'l' taken away is 'CAN'.
(Other definitions for can that I've seen before include "Billy" , "Cooler" , "let go in the US" , "toilet" , "Tin; be able to" .)