Collapse

FALL

Think of what happens to leaves in autumn or a tower made of blocks when it loses balance.

"Collapse" is a straightforward clue where the answer is a simple synonym—"FALL" means the same thing in everyday language. It could also hint at the season "fall" (autumn), but here the focus is on the physical act of dropping or crumbling. No tricky wordplay, just a direct match between clue and answer.