How do I solve 9 across in Times Cryptic 5218?

Question

Accepted Answer

9 across reads "A pinko brat upset office temp?" (10 letters); the answer is PORTAKABIN. 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.

A pinko brat upset office temp? (10)

9A — A pinko brat upset office temp? (10) — PORTAKABIN