Azure or ultramarine, eg (4)
I believe the answer is:
blue
I believe this clue is a double definition.
'azure' is the first definition.
(I've seen this before)
'ultramarine eg' is the second definition.
(ultramarine is a kind of blue)
(Other definitions for blue that I've seen before include "Sky-coloured" , "e.g. Indigo" , "Miserable - cerulean" , "Indecent" , "Varsity sportsman" .)