Rainbow colour (6)
'rainbow colour' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for indigo that I've seen before include "product of woad" , "Ellington's Mood" , "Dark blue dye (plant)" , "Blue-violet colour" , "Violet dye" .)
'rainbow colour' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for violet that I've seen before include "Shade of purple" , "It nods on Oberon's bank" , "Herbaceous flower" , "Mauve" , "Rainbow colour; flower" .)