In Cards, a 10 and an Ace to Make 21
Puzzle 2 of Aquarium Easy Pack
Question is: In Cards, a 10 and an Ace to Make 21
and the answer is: BLACKJACK
Word Meaning:
BLACKJACK — (card games) A common gambling card game in casinos, where the object is to get as close to 21 without going over.
Definitions from Wiktionary.