How do I solve 23 down in Daily Telegraph Cryptic 3373?

Question

Accepted Answer

23 down reads "Feast upon artist" (5 letters); the answer is MUNCH. 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.

Feast upon artist (5)

23D — Feast upon artist (5) — MUNCH