Friendly islands have got an unusual name (5)
I believe the answer is:
tonga
'friendly islands' is the definition.
(I've seen this in another clue)
'got an unusual name' is the wordplay.
'got an' can be anagrammed to 'TONGA'.
Though, I am not sure how the anagram is indicated.
'have' is the link.
Can you help me to learn more?
(Other definitions for tonga that I've seen before include "two-wheeler" , "Pacific island kingdom" , "SW Pacific monarchy" , "South Pacific kingdom, capital Nuku'alofa" , "Polynesian Kingdom" .)