How do I solve 15 across in Daily Telegraph Cryptic 31244?

Question

Accepted Answer

15 across reads "Line that touches bronzed chap?" (7 letters); the answer is TANGENT. 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.

Line that touches bronzed chap? (7)

15A — Line that touches bronzed chap? (7) — TANGENT