Kindly fellow sits in the shade (6)
I believe the answer is:
humane
'kindly' is the definition.
(thesaurus)
'fellow sits in the shade' is the wordplay.
'fellow' becomes 'man' (fellow can mean a man).
'sits in' indicates putting letters inside.
'the shade' becomes 'hue' (both can mean a colour).
'man' placed inside 'hue' is 'HUMANE'.
(Other definitions for humane that I've seen before include "Showing compassion or consideration for others" , "Kind and sympathetic" , "sort of killer" , "Benign - kind" , "Kindly and compassionate" .)