How do I solve 5 down in Daily Telegraph Cryptic 31237?

Question

Accepted Answer

5 down reads "Doctor rates the rooms in hospital" (8 letters); the answer is THEATRES. It's an anagram clue: the answer is a rearrangement of letters supplied by the clue itself. Look for an indicator like 'mixed', 'broken', 'cooked', or 'wild', and find a phrase whose letters add up to the answer's length. The full step-by-step breakdown is on this page.

Doctor rates the rooms in hospital (8)

5D — Doctor rates the rooms in hospital (8) — THEATRES