Colossus 139

Yes, you probably have some mistake.

190a huge -r-a (area, epic?)
205a global finance body i-f IMF (International Monetary Fund)
menacing o-t-o-s. Ominous

Yes I did have a mistake
When I put ominous in I found out that huge was mega and another mistake was fair instead of fete. You only need one slip up and you are stimey
Many thanks