Help for CLEAR BANS:
Clear bans will remove all bans found in a specific
channel. If your ircd supports other lists associated
with a channel (e.g. ban exceptions), you can clear
these by specifying the mode letters. Specify an
asterisk to clear all lists.
Syntax: CLEAR <#channel> BANS [types]
Examples:
/msg ChanServ CLEAR #support BANS
Clears #support ban list.
/msg ChanServ CLEAR #support BANS eI
Removes all ban and invite exceptions on #support
(if your ircd supports them).
/msg ChanServ CLEAR #support BANS *
Clears all lists of #support.
/msg ChanServ CLEAR #support BANS +
Shows the possible letters.