Colourful source of surprise (4)
I believe the answer is:
blue
This clue might be a double definition.
'colourful' is the first definition.
Both the answer and definition are adjectives. Maybe you can see a link between them that I don't see?
'source of surprise' is the second definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
Can you help me to learn more?
(Other definitions for blue that I've seen before include "Miserable; waste (money)" , "Colour of low spirits" , "Primary colour" , "Oxbridge player" , "Dejected" .)