Send packing container (4)

I believe the answer is:

sack

I believe this is a double definition.

'send packing' is the first definition.
(thesaurus)

'container' is the second definition.
(sack is a kind of container)

(Other definitions for sack that I've seen before include "Elbow" , "Dismiss; an old wine" , "Get rid of" , "Loot the large bag" , "Fire (sl.)" .)

I've seen this clue in The Times.

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