How do I solve 12 across in Daily Telegraph Cryptic 31256?

Question

Accepted Answer

12 across reads "Bishop: I ate something laced with drugs" (7 letters); the answer is OPIATES. It's a charade: the answer breaks into parts in clue order, each part clued by a word or short phrase. No indicators needed; watch for standard abbreviations (RA = artist, US = American, IN = at home) and short synonyms. The full step-by-step breakdown is on this page.

Bishop: I ate something laced with drugs (7)

12A — Bishop: I ate something laced with drugs (7) — OPIATES