Clapping is prescribed for women if something alarms them during prayer, or they are praying with the men and the imam makes a mistake in the prayer.

It is permissible to backbite a non-Muslim if he is a Harbi (one who is at war with the Muslims) because Prophet Muhammad used to command Hassan to lampoon the pagans. Backbiting a non-Muslim is impermissible if he is a Dhimmi because Prophet Muhammad said ‘Whoever makes a snide comment to a Dhimmi has earned Hell.’

This is how to get rid of jealousy: make du`a to Allah to rid you of jealousy, ponder the meanings of the Quranic verses on hasad, read about how Prophet Muhammad (peace and blessings of Allah be upon him) kept away from hasad.