Shade next door to Anne maybe is down (5,4)
I believe the answer is:
royal blue
'shade' is the definition.
(shade of blue)
'next door to anne maybe is down' is the wordplay.
'next door to' is a charade indicator (letters next to each other).
'anne maybe' becomes 'royal' (Princess Anne is a royal).
'is down' becomes 'blue' (I've seen this before).
'royal' next to 'blue' is 'ROYAL BLUE'.
(Other definitions for royal blue that I've seen before include "Dark colour" , "Queen's shade?" , "Bally euro (anag.)" , "Your be-all (anag) - shade" , "(Regal?) colour" .)