How do I solve 19 down in Times Cryptic 29538?

Question

Accepted Answer

19 down reads "Worst and best places to break journey" (3,4 letters); the answer is PIT STOP. 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.

Worst and best places to break journey (3,4)

19D — Worst and best places to break journey (3,4) — PIT STOP