Teach your baby the sign for the word clock in baby sign language with the following description and video.
Hold a fist in front of the body with the palm facing down. Form the other hand into an index hand shape. Tap the index finger to the back of the wrist twice. Then form both hands into curved hands. Hold both curved hands to form a circle at the side of the face.
Acredolo, Linda & Susan Goodwyn. 2009. Baby signs: How to talk with your baby before your baby can talk, 3rd edn. New York: McGraw Hill.