Clap hand on often refers to catching or apprehending someone. Some antonyms for this phrase could be to release, free, or let go, indicating the opposite action or outcome. Other possible antonyms could include to overlook, ignore, or miss, meaning that the person in question is not caught or noticed. In a more metaphorical sense, antonyms for clap hand on could include to embrace, support, or uplift, indicating a positive and welcoming action instead of a negative one such as catching or apprehending. Ultimately, the choice of antonym depends on the desired meaning and context of the sentence.