How do I solve 14 down in Times Cryptic 29545?

Question

Accepted Answer

14 down reads "Hit by surprisingly subtle campaign vehicle" (9 letters); the answer is BATTLEBUS. 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.

Hit by surprisingly subtle campaign vehicle (9)

14D — Hit by surprisingly subtle campaign vehicle (9) — BATTLEBUS