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Unit of heat, one of many counted by weight-watcher (7)


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'unit of heat' is the definition.
(I've seen this in another clue)

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(Other definitions for calorie that I've seen before include "Unit of heat energy" , "Unit of heat (concerned with diet)" , "Food energy unit" , "Unit of energy in foods" , "Oil race (anag)" .)

I've seen this clue in The Telegraph.
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