__ Peroxide, Anti-Acne Medication
Puzzle 13 of Sports Venue Hard Pack
Question is: __ Peroxide, Anti-Acne Medication
and the answer is: BENZOYL
Word Meaning:
BENZOYL — (organic chemistry, especially in combination) A univalent radical formally derived from benzoic acid, C₆H₅CO-, by removal of the hydroxyl group.
Definitions from Wiktionary.