Crossword Genius

Not desirable company it's said (5)

Ross

I believe the answer is:

three

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This clue might be a double definition.

'not desirable company' is the first definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.

'said' is the second definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I don't see?

'it's' is the link.

Can you help me to learn more?

(Other definitions for three that I've seen before include "Number of blind mice" , "So many 12s today" , "Feet in 3 Down" , "Cardinal number" , "A crowd, you might say" .)

I've seen this clue in The Globe and Mail and The Irish News.
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