How do I solve 20 across in Daily Telegraph Cryptic 31241?

Question

Accepted Answer

20 across reads "Salesman and consumer in Winchester?" (8 letters); the answer is REPEATER. 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.

Salesman and consumer in Winchester? (8)

20A — Salesman and consumer in Winchester? (8) — REPEATER