What does the cryptic crossword clue "Chap alone I suspect in Greek island (10)" mean?

The definition is "island". The wordplay uses an anagram. anagram of CHAP + ALONE + I = CEPHALONIA; definition: "island" The answer is CEPHALONIA.

Chap alone I suspect in Greek island (10)

Daily Mail Cryptic #17401 | 11 Across | 2024-07-15 flower