How do I solve 11 across in Daily Telegraph Cryptic 31258?

Question

Accepted Answer

11 across reads "One working on cool apartment's expansion" (9 letters); the answer is INFLATION. 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.

One working on cool apartment's expansion (9)

11A — One working on cool apartment's expansion (9) — INFLATION