Islanders queue in HQ (8)
I believe the answer is:
balinese
'islanders' is the definition.
(people from Bali in Indonesia)
'queue in hq' is the wordplay.
'queue' becomes 'line' (a line of people).
'in' means one lot of letters goes inside another.
'hq' becomes 'base' (I've seen this before).
'line' going inside 'base' is 'BALINESE'.
(Other definitions for balinese that I've seen before include "Foreign language" , "policy needs external support" , "Indonesian" , "Islanders" , "Asian language" .)