Hunt, at heart absolutely not fair (6)

I believe the answer is:

unjust

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'not fair' is the definition.
('unjust' is the opposite to 'fair')

'hunt at heart absolutely' is the wordplay.
'at heart' indicates the central letters.
'absolutely' becomes 'just' (I am not sure about this - if you are sure you should believe this answer much more).
The middle of 'hunt' is 'un'.
'un'+'just'='UNJUST'

Can you help me to learn more?

(Other definitions for unjust that I've seen before include "Not fair or equitable" , "Unfair" , "Biased" , "Inequitable" , "Partisan - not fair" .)

I've seen this clue in The Telegraph.

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