Baseline modified for islanders (8)
I believe the answer is:
balinese
'islanders' is the definition.
(people from Bali in Indonesia)
'baseline modified' is the wordplay.
'modified' indicates an anagram.
'baseline' is an anagram of 'BALINESE'.
'for' acts as a link.
(Other definitions for balinese that I've seen before include "Asian language" , "policy needs external support" , "Foreign language" , "Indonesian" , "Islanders" .)