Silly enough to wear a motley mixture? (7)
I believe the answer is:
foolish
'silly' is the definition.
(similar in meaning)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for foolish that I've seen before include "Not very bright" , "Silly, lacking common sense" , "Unwise or ridiculous" , "Idiotic" , "Half-baked" .)