Colour of garment mostly worn by females (7)
I believe the answer is:
saffron
This clue could be a double definition.
'colour' is the first definition.
(saffron is a kind of colour)
'garment mostly worn by females' is the second definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'of' acts as a link.
Can you help me to learn more?
(Other definitions for saffron that I've seen before include "Orange flower part used in flavouring food" , "The stigma" , "Culinary spice" , "Orange-yellow spice" , "Fans for, say orange food flavour and colouring" .)