Is it permissible to clap hands inside the Masjid (mosque) to honor a speaker or a Khatib (preacher) in ceremonies?
It is impermissible to clap except for women's clapping during Salah (Prayer) when the Imam makes a mistake. The Prophet (peace be upon him) said:
"If something unusual happens in the Salah, men should say, 'Subhan Allah (Glorified be Allah)' and women should clap''.
Actually men's clapping is an act of Jahiliyyah (pre-Islamic time of ignorance) as Allah (Exalted be He) says:
Their Salât (prayer) at the House (of Allâh, i.e. the Ka‘bah at Makkah) was nothing but whistling and clapping of hands.
People of knowledge have interpreted Muka' as whistling and Tasdiyah as clapping.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.