How do I solve 17 across in Times Cryptic 29536?

Question

Accepted Answer

17 across reads "Change train to get away" (4,4 letters); the answer is TURNTAIL. 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.

Change train to get away (4,4)

17A — Change train to get away (4,4) — TURNTAIL