Cheers for Naartje.
What about 7d? (7) 'Uncle Sam? (1001 names?)' I'm thinking 'kinsman' or 'kinsmen'
but feel that it's meant to be an anagram of names and ki.
Also, 21d (5) '5th number ones'. All I can think of is 'nines' but I don't really see why. Any help?