What does the cryptic crossword clue "Ship’s controller heading off to part of Jersey (5)" mean?

The definition is "Jersey". The wordplay uses a deletion. UDDER (deletion) = UDDER; definition: "part of Jersey" The answer is UDDER.

Ship’s controller heading off to part of Jersey (5)

Guardian Cryptic #29582 | 26 Across | 2025-01-03 flower