Guardian Prize 29201

[mikem004]

10a) Number in exchange? (6)

N-N-T-

The solution is pretty obvious, a number. But I can't see how it follows from the clue.

[Lie-in King]

Ninety - in '(e)XC(hange)'

[Patsy33]

Is it Nine & TY = Thank you ( exchange) ?

[newmodarmy]

I don't think so Patsy- I think its the Roman numeral XC for 90 as given in the first reply. 

[Patsy33]

Yes, of course! 

Well done as always, LiK 😀