A statement of the obvious about Left's consideration for others (8)
I believe the answer is:
altruism
'consideration for others' is the definition.
(I've seen this before)
'a statement of the obvious about left's' is the wordplay.
'statement of the obvious' becomes 'truism' (I've seen this before).
'about' is a charade indicator (letters next to each other).
'left' becomes 'l' (common abbreviation).
'truism' put after 'l' is 'ltruism'.
'a'+'ltruism'='ALTRUISM'
(Other definitions for altruism that I've seen before include "Consideration for others first" , "Unselfish action, generosityfor its own sake" , "Selflessness" , "Pine; last word of Lear" , "Unselfishness shown by muralist" .)