Islanders queue to enter HQ (8)
I believe the answer is:
balinese
'islanders' is the definition.
(people from Bali in Indonesia)
'queue to enter hq' is the wordplay.
'queue' becomes 'line' (a line of people).
'to enter' is an insertion indicator.
'hq' becomes 'base' (I've seen this before).
'line' put into 'base' is 'BALINESE'.
(Other definitions for balinese that I've seen before include "Foreign language" , "Indonesian" , "Islanders" , "policy needs external support" , "Asian language" .)