How do I solve 5 down in Times Cryptic 29550?

Question

Accepted Answer

5 down reads "Weak creature, he’s to what extent to be in charge?" (3,3,4 letters); the answer is RUN THE SHOW. 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.

Weak creature, he’s to what extent to be in charge? (3,3,4)

5D — Weak creature, he’s to what extent to be in charge? (3,3,4) — RUN THE SHOW