4 to do
19d Islamic State's downed in anti-aircraft here (4)
?S?A
Must be Asia
12d One in 19 loses colour on drugs taken in Nebraska (8)
?E?A???E
Lebanese ?
16d Achieve much after exchange words about North Dakota city (5)
?A???
21a Boy, athletic type, is in a bad place for a Highlander (7)
??E?C??