Dance tango in friendly islands (5)
I believe the answer is:
tonga
'friendly islands' is the definition.
(I've seen this before)
'dance tango' is the wordplay.
'dance' indicates an anagram (I've seen this in other clues).
'tango' anagrammed gives 'TONGA'.
'in' is the link.
(Other definitions for tonga that I've seen before include "Horse-drawn vehicle" , "Pacific island state" , "two-wheeler" , "Polynesian Kingdom" , "Tropic island" .)