How do I solve 20 across in Daily Telegraph Cryptic 3373?

Question

Accepted Answer

20 across reads "End of discussions, don't say a word!" (5 letters); the answer is SHUSH. It's a double-definition clue: two separate definitions of the same word sit side by side. No wordplay split and no indicators — both halves of the clue define the answer. The full step-by-step breakdown is on this page.

End of discussions, don't say a word! (5)

20A — End of discussions, don't say a word! (5) — SHUSH