How do I solve 24 across in Daily Telegraph Cryptic 31240?

Question

Accepted Answer

24 across reads "Bill, able to sing well" (7 letters); the answer is INVOICE. 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.

Bill, able to sing well (7)

24A — Bill, able to sing well (7) — INVOICE