How do I solve 2 down in Express Cryptic 20260609?

Question

Accepted Answer

2 down reads "Wet set of lessons in building precaution" (4,6 letters); the answer is DAMP COURSE. 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.

Wet set of lessons in building precaution (4,6)

2D — Wet set of lessons in building precaution (4,6) — DAMP COURSE