Islander promoting firearms ban is touring area (8)

I believe the answer is:

antiguan

'islander' is the definition.
(I've seen this before)

I cannot understand how the rest of the clue works.

(Other definitions for antiguan that I've seen before include "from the West Indies" , "West Indian" , "From a Caribbean island paired with Barbuda" , "Islander" .)

I've seen this clue in The Times.

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