How do I solve 20 across in Times Cryptic 29540?

Question

Accepted Answer

20 across reads "Drink separately in fun" (9 letters); the answer is TEASINGLY. 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.

Drink separately in fun (9)

20A — Drink separately in fun (9) — TEASINGLY