Very Andy Summers. Try adding delay in synch with the song tempo.
but yes, A (add 9) - or A5 (Add 9) - if you really wanna be a dweeb
This. Sus4/5 'chords' are really diads as the third is replaced with the fourth or fifth.It could be called 'A5' if it didn't have a third, but it does ... in this case, C#, making the basic A Major triad (and obviously also including the B but no sixth or seventh, making it A Major (add 9), more commonly called simply A (add 9).
Hodswoth.