Crossword Genius

Heart stimulant (7)

Ross

I believe the answer is:

cardiac

(Other definitions for cardiac that I've seen before include "Of the heat, perhaps illness" , "Physiologically, of the heart" , "Appertaining to the heart" , "Relating to 8 down, part one" , "of hearts" .)

I've seen this clue in the USA Today and The Telegraph.
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