How do I solve 30 across in Daily Telegraph Cryptic 31243?

Question

Accepted Answer

30 across reads "Fascinated teens tried dancing" (10 letters); the answer is INTERESTED. 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.

Fascinated teens tried dancing (10)

30A — Fascinated teens tried dancing (10) — INTERESTED