opening I found among set of books for bird (4,3)...????/tit - I'm sure it's blue tit, but that mucks up 1a (a lot of opportunity with foreign money going backward and forward (6)) and 10a Uniform name largely for riding competitor (which I'm sure is equitor)
thanks, but I'm not sure that's the correct answer...couldn't see any link between Rooney and the question....I'd be more tempted by "plenty"...as that fits the clue, if not the letters I already have.