Compassionate chap in shade (6)
I believe the answer is:
humane
'compassionate' is the definition.
(similar in meaning)
'chap in shade' is the wordplay.
'chap' becomes 'man' (chap can mean a man).
'in' is an insertion indicator.
'shade' becomes 'hue' (I've seen this before).
'man' going into 'hue' is 'HUMANE'.
(Other definitions for humane that I've seen before include "sort of killer" , "Kind and merciful" , "Kind and sympathetic" , "Compassionate, merciful" , "Kindly and compassionate" .)