How do I solve 24 across in Times Cryptic 3303?

Question

Accepted Answer

24 across reads "Study American country’s energy" (6 letters); the answer is PERUSE. 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.

Study American country’s energy (6)

24A — Study American country’s energy (6) — PERUSE