Crossword Genius

Liar must be made to show unselfishness (8)

Ross

I believe the answer is:

altruism

'unselfishness' is the definition.
(altruism is a kind of unselfishness)

'liar must be made' is the wordplay.
'be made' is an anagram indicator.
'liar'+'must'='liarmust'
'liarmust' with letters rearranged gives 'ALTRUISM'.

'to show' is the link.

(Other definitions for altruism that I've seen before include "Unselfishness shown by muralist" , "Selflessness" , "Unselfishness, Philanthropy" , "Trial sum (anag.)" , "Unselfish generosity" .)

I've seen this clue in The Globe and Mail.
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