Not desirable company it's said (5)
I believe the answer is:
three
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" .)