4 down
Military
standard
unveiled
by
East
Wing
(6)
Military standard unveiled by East Wing (6)
hints
0
checks
0
hints
The definition is at the end of the clue.
How the clue works
A Military standard is a BANNER, and "unveiled" tells us to strip off its outer letters to leave ANNE. Add X (the "by" sign, as in 3 by 4) and E for East, giving ANNE-X-E — an Wing of a building.