Compassionate fellow wearing a colour (6)
I believe the answer is:
humane
'compassionate' is the definition.
(similar in meaning)
'fellow wearing a colour' is the wordplay.
'fellow' becomes 'man' (fellow can mean a man).
'wearing' is an insertion indicator.
'a colour' becomes 'hue' (a hue is a colour or complexion).
'man' inserted into 'hue' is 'HUMANE'.
(Other definitions for humane that I've seen before include "Kind and civilised" , "Compassionate, benevolent" , "Inflicting minimal pain" , "Kind and liberal" , "Showing compassion or consideration for others" .)