A tug in a storm in the West Indies (7)
I believe the answer is:
antigua
'in the west indies' is the definition.
('Antigua' is part of 'west indies')
'a tug in a storm' is the wordplay.
'storm' is an anagram indicator.
'tug'+'in'+'a'='tugina'
'tugina' is an anagram of 'ntigua'.
'a'+'ntigua'='ANTIGUA'
(Other definitions for antigua that I've seen before include "holiday destination" , "warm island" , "Largest of Leeward Is." , "Caribbean island linked with Barbuda" , "West Indies island" .)