Ouch! This is a hard one!
I've completed grid fill apart from 48a, so if some kind person will help me I can move to the next step!
Pretty sure there is a clash in this one, but, for what it's worth, here is the clue and my current letters.
Creditor going after money - I owe over a thousand mill.
Definition has a misprint, and my letters are; M?TRO?
Thanks