What does the cryptic crossword clue "Breakdown of a top reusable tourist vehicle (8,4)" mean?

The wordplay uses an anagram. anagram of A + TOP + REUSABLE = PLEASUREBOAT The answer is PLEASUREBOAT.

Breakdown of a top reusable tourist vehicle (8,4)

Daily Mail Cryptic #17112 | 1 Across | 2023-06-05 flower