Selflessness (8)
I believe the answer is:
altruism
'selflessness' is the definition.
(synonyms)
This is all the clue.
(Other definitions for altruism that I've seen before include "Unselfishness shown by muralist" , "Unselfishness found in ultraism" , "Consideration for others first" , "Unselfishness, Philanthropy" , "Pine; last word of Lear" .)