Filthy

NASTY

Think of a slang term for something disgusting or unpleasant, often used to describe spoiled food or bad behavior.

Filthy" is a straightforward clue where the answer is a synonym—"nasty" means dirty or disgusting in the same way. There’s no hidden wordplay here; it’s a direct definition clue common in crosswords. If you think of "nasty" as slang for something unpleasant or grimy, it fits perfectly. The clue relies on everyday language rather than tricks or puns.