Quote hit insulator (4)

I believe the answer is:

batt

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'quote' is the definition.
Both the definition and answer are singular nouns.
Maybe you can see an association between them that I can't see?

'hit insulator' is the wordplay.
'hit' becomes 'bat' (batting is a kind of hitting).
'insulator' becomes 't' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'bat'+'t'='BATT'

Can you help me to learn more?

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

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