If there were 3 members can one player playing alone without inviting other members to the clan earn clan xp
if so how much
If you place in the top 3 in clan wars then yes you can earn clan xp because that is one of the rewards for placing in the top 3. However, that's the only way that you'll earn clan xp while playing by yourself. I don't remember the breakdown for how much xp is earned for finishing in each of the top 3 spots but I want to say that 1st place is around 150,000 xp. I could be totally off on that number though.
so that means by clan vs clan i cannot earn