Lambs upset bull in container for needy people

I believe the answer is:

almsbox

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'container for needy people' is the definition.
I can't tell whether this definition defines the answer.

'lambs upset bull' is the wordplay.
'upset' is an anagram indicator.
'bull' becomes 'ox'.
'lambs' is an anagram of 'almsb'.
'almsb'+'ox'='ALMS BOX'

'in' acts as a link.

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I've seen this clue in The Daily Mail.

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