How do I solve 19 across in Daily Telegraph Cryptic 3374?

Question

Accepted Answer

19 across reads "Fly in salad?" (6 letters); the answer is ROCKET. 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.

Fly in salad? (6)

19A — Fly in salad? (6) — ROCKET