Often drunk - too much is bad for it (6)

I believe the answer is:

health

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'it' is the definition.
The definition suggests a singular noun which matches the answer.

I can't explain the remainder of the clue.

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(Other definitions for health that I've seen before include "State of being free from illness" , "good shape" , "Fettle -- condition" , "It's said to be more than wealth" , "Fine condition" .)

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

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