How do I solve 4 down in Daily Telegraph Cryptic 31264?

Question

Accepted Answer

4 down reads "Avoid royal memoir" (5 letters); the answer is SPARE. 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.

Avoid royal memoir (5)

4D — Avoid royal memoir (5) — SPARE