Chaps keep score in mind (8)

I believe the answer is:

mentally

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'chaps keep score in mind' is the definition.
I can't tell whether this definition defines the answer.

'chaps keep score' is the wordplay.
'chaps' becomes 'men' (chap can mean a man).
'keep score' becomes 'tally' (synonyms).
'men'+'tally'='MENTALLY'

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(Other definitions for mentally that I've seen before include "by way of intellect" , "Cerebrally" , "how intelligence is developed" , "rationally" , "in the head" .)

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

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