How do I solve 8 down in Daily Telegraph Cryptic 3370?

Question

Accepted Answer

8 down reads "Veg out, eat that with a piece of cake" (4,2,4 letters); the answer is TAKE IT EASY. 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.

Veg out, eat that with a piece of cake (4,2,4)

8D — Veg out, eat that with a piece of cake (4,2,4) — TAKE IT EASY