Be a shade over-extravagant? (4)
I believe the answer is:
blue
I believe this is a double definition.
'be a shade' is the first definition.
(I've seen this before)
'over-extravagant?' is the second definition.
(I've seen this before)
(Other definitions for blue that I've seen before include "Tory?" , "Sad, melancholy" , "as the sky, perhaps" , "Australian redhead" , "It's used to whiten laundry" .)