A self-made traitor may be so described (5)

I believe the answer is:

false

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'traitor may be so described' is the definition.
I can't judge whether this defines the answer.

'a self-made' is the wordplay.
'made' is an anagram indicator.
'a'+'self'='aself'
'aself' anagrammed gives 'FALSE'.

Can you help me to learn more?

(Other definitions for false that I've seen before include "Unfaithful" , "Bogus" , "Mendacious" , "Wrong" , "Fake; untrue" .)

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

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