West Indian brother (9)

I believe the answer is:

dominican

I believe this is a double definition.

'west indian' is the first definition.
(I know that Dominican is a type of west indian)

'brother' is the second definition.
(monk belonging to the order of St Dominic)

(Other definitions for dominican that I've seen before include "Republican" , "One of many brothers" , "One working in order" , "Caribbean islander" , "See sister" .)

I've seen this clue in The Times.

Want a hint initially instead of a full solution? Install my app