O quisling, that IS good. I’d been trying to make something of the first four letters of the solution but was fixated on the first letter of lOver, thinking that the remaining letters represented the last letter of the solution.
Having said that, I’m still not entirely convinced: if ‘capital O’ is a charade of the answer, what is the significance of the l, v and r, beyond a repetition of the definition?
Tricksy indeed!