Yes, it's VETTING all right, but the first T is one of the clashes, and in order to work it has to become VEOTING. Google doesn't suggest that this word (not in BRB) exists anywhere else - not even a remote geographical location. The fact that I can't solve 14A (-N-IN-) where the first letter is also a clash suggests that I may have this area of the puzzle wrong. But the "three-word phrase" is in the obvious place, and makes complete sense with 1A, so summat's oop. But what?