THE SOLUTION: A new clan mode! No brainer! This mode would be called 'capped'. As the name suggests the leader or co leaders can set this mode and simply add an extra filter:
-Newbie delay time: Set the time between new players joining from 30 seconds to 1 hour or more possibly
this can be nice, a delay between joining players so the chat won't be spammed by "xxx joined the clan" or troop requests.
MORE POSSIBLE OPTIONS (NOT WITH THE CAPPED MODE JUST GENERAL OPTIONS)
-Exp level min to join: Set minimum exp level to join as trophies are sometimes not enough
this is ruled out.
-Town hall level min to join: Similar to before but town hall obviously
this too.
-Clan activity: Set clan to 'dead', 'fairly active', 'active' or 'very active'
yes, this is nice! my old clan was an active clan just a month ago, but then some members stopped playing. so it nearly died and they are trying to save it 
-Clan language: Not location, language as I run an english clan but I like Americans joining too
maybe, but the location of your clan says enuf of your general language.. but with international clans... maybe
-Clan catchphrase: Pleeeeeeease add!!!
you can add a catchphrase to the clan description (but the font size is so small)
-Clan best replay: Leader can choose and pin the clan's best replay (nice idea but not vital

)
yes. nice idea but not vital.
Any advances on my clan mode idea or my options idea? Post them below :P