Drum on crate in ensemble (9)

I believe the answer is:

container

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'drum' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps there's an association between them I don't understand?

'on crate in ensemble' is the wordplay.
'ensemble' indicates an anagram.
'on'+'crate'+'in'='oncratein'
'oncratein' is an anagram of 'CONTAINER'.

Can you help me to learn more?

(Other definitions for container that I've seen before include "Large shipping box" , "Eg, box" , "storage" , "Receptacle" , "Something to hold" .)

I've seen this clue in The Irish Times.

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