Dictator's to outlaw green cloth garment (7)
I believe the answer is:
bandeau
'garment' is the definition.
(bandeau is a kind of garment)
'dictator's to outlaw green cloth' is the wordplay.
I cannot quite understand how this works, but
'outlaw' could be 'ban' (banning is a kind of outlawing) and 'ban' is present in the answer.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for bandeau that I've seen before include "Narrow piece of ribbon worn round the head" , "Headgear" , "Hair securing strip" , "What woman might wear" , "What may be worn by girl" .)