What does the cryptic crossword clue "Band guarded by Samoa's islanders (5)" mean?

The definition is "Band". The wordplay uses a hidden word. Hidden in "band guarded by samOA'S ISlanders" The answer is OASIS.

Band guarded by Samoa's islanders (5)

Guardian Cryptic #29036 | 23 Down | 2023-04-05 flower