How do I solve 16 across in Daily Telegraph Cryptic 31240?

Question

Accepted Answer

16 across reads "Addiction treatment of idiotic Texan drunk" (14 letters); the answer is DETOXIFICATION. 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.

Addiction treatment of idiotic Texan drunk (14)

16A — Addiction treatment of idiotic Texan drunk (14) — DETOXIFICATION