What does the cryptic crossword clue "Charter boat picked up for senior person (8)" mean?

The wordplay uses a homophone (sounds like). Homophone/pun/aural wordplay [ picked up ] of HIRE ARK (“charter boat”) The answer is HIERARCH.

Charter boat picked up for senior person (8)

Guardian Cryptic #29425 | 25 Across | 2024-07-03 flower