What does the cryptic crossword clue "Covert mercenary in position in Jamaica (5)" mean?

The definition is "Jamaica". The wordplay uses a hidden word. Hidden in "covert mercenary in positioN IN JAmaica" The answer is NINJA.

Covert mercenary in position in Jamaica (5)

Independent Cryptic #11776 | 22 Across | 2024-07-08 flower