Mean I will - strange and true (3,7)

I believe the answer is:

ill natured

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'mean' is the definition.
Both the answer and definition are adjectives. Maybe you can see an association between them that I don't see?

'i will strange and true' is the wordplay.
'i will' becomes 'ill' (I've seen this before).
'strange' indicates an anagram.
'and'+'true'='andtrue'
'andtrue' with letters rearranged gives 'natured'.
'ill'+'natured'='ILL-NATURED'

Can you help me to learn more?

(Other definitions for ill natured that I've seen before include "Bad-tempered" , "malicious" .)

I've seen this clue in The Daily Express.

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