Applause, Clapping Hands
noun, verbal noun
Hands beating together is actually applause. Though... you might be doing it wrong if you're actually beating them together.
はくしゅ
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
舞台が終わった後、拍手が鳴り止まなかった。
After the scene ended, the applause did not stop roaring.