Words with more than one meaning (10,5)

I believe the answer is:

collective nouns

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'words with more' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'one meaning' is the wordplay.
I cannot quite see how this works, but
an anagram of 'one' is 'eno' which is within the answer.
This may be the basis of the clue (or it may be nonsense).

'than' is the link.

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I've seen this clue in The Daily Express.

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