How do I solve 15 down in Express Cryptic 20260608?

Question

Accepted Answer

15 down reads "Ability to get wild deer broken" (9 letters); the answer is KNACKERED. It's an anagram clue: the answer is a rearrangement of letters supplied by the clue itself. Look for an indicator like 'mixed', 'broken', 'cooked', or 'wild', and find a phrase whose letters add up to the answer's length. The full step-by-step breakdown is on this page.

Ability to get wild deer broken (9)

15D — Ability to get wild deer broken (9) — KNACKERED