My idea for clan groups is that the leader gets to make 'groups' within the clan.
For an idea of the concept, the Leader, Co-Leader, and the Elder are default groups.
When a leader decides to create a new group, a form the like Create-a-Clan will show up. In here, the leader will be able to specify the name and permissions this group has.
Example:
Group 'N3wbies' -
Permissions: Talk, Donate Troops, Spectate Wars
Can be kicked by: All
Can promote others to: None
Can demote None to None
Group 'Trusted' -
Permissions: Talk, Request Troops, Donate Troops, Invite, Spectate Wars, Participate in Wars
Can be kicked by: Leader, Co-Leader
Can promote others to: Elder
Can demote Elders to Members ; Can demote Members to N3wbies
This idea creates room for a vast amount of creativity and customization, and please share concerns or comments.

