How to remove participants from a channel?
To remove participants from a channel, go to Participants View by clicking on the participant count below channel name in chat header. In here hover over the user, click on option icon in the right side and select Remove.
You will be able to remove users from channels only if you have permission to do so.
Channels in Cliq have a set of permissions where channel controls can be enabled/disabled for users. To learn more, refer here - Channel Permissions