Liar must reform to show regard for others (8)
I believe the answer is:
altruism
'show regard for others' is the definition.
I can't judge whether this defines the answer.
'liar must reform' is the wordplay.
'reform' indicates anagramming the letters (letters in a new form).
'liar'+'must'='liarmust'
'liarmust' is an anagram of 'ALTRUISM'.
'to' acts as a link.
Can you help me to learn more?
(Other definitions for altruism that I've seen before include "Selfless concern for the well-being of others" , "Unselfish concern for the welfare of others" , "Selflessness" , "Unselfishness shown by muralist" , "Unselfish action, generosityfor its own sake" .)