Hello Alan, Mister Micawber, Beeesneees, Mordant and other native English speakers,
oxfordadvancedlearnersdictio … hot#long_1
a [color=red]long shot
an attempt or a guess that is not likely to be successful but is worth trying
It’s a long shot, but it just might work.
A “[color=red]long shot” (two words) is correct, but a “[color=darkblue]long-shot” (one word) is wrong, is it?