How do I solve 9 across in Daily Telegraph Cryptic 31236?

Question

Accepted Answer

9 across reads "Weirdo bold lad upset" (7 letters); the answer is ODDBALL. 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.

Weirdo bold lad upset (7)

9A — Weirdo bold lad upset (7) — ODDBALL