Goes abroad missing grand airline (8)
I believe the answer is:
emirates
'airline' is the definition.
(I've seen this before)
'goes abroad missing grand' is the wordplay.
'goes abroad' becomes 'emigrates'.
'missing' indicates named letters should be taken away.
'grand' becomes 'g' ('G' can be a synonym of 'grand').
'emigrates' with 'g' taken away is 'EMIRATES'.
(Other definitions for emirates that I've seen before include "Arab lands" , "United Arab -------, Gulf state" , "in the airline business" , "lands in the Gulf" , "Eg, Abu Dhabi & Dubai" .)