Hack interpretation shows level-headedness (5-5)

I believe the answer is:

horse-sense

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'hack interpretation' is the definition.
The answer and definition can be both related to thinking as well as being singular nouns.
Perhaps you can see an association between them that I can't see?

'shows level-headedness' is the wordplay.
'shows' becomes 'horse' (I can't justify this - if you can you should give a lot more credence to this answer).
'level-headedness' becomes 'sense' (I've seen this in another clue).
'horse'+'sense'='HORSE-SENSE'

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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