To hit someone or something with the hand or with a heavy object. (Cambridge Dictionary)
A blow especially with the hand. (Merriam – Webster)
A white cloth on a stake or frame used as a target in archery. (Merriam – Webster)
A heavy blow with the hand or a hard object. (Oxford Dictionaries)
A blow, especially with the hand; cuff: (Dictionary.com)
If you clout someone, you hit them. (Collins Dictionary)
A person or institution that has clout has influence and power. (Collins Dictionary)
Three strikes and a clout: US school brings back the paddle.
Captain America sequel hits UK box office with a clout.