In Train Your Clan, you can find many clan members and tutors that can help you level up your skills faster.

Each tutor has a specific task that will help you to level up in one or more skills. For instance, there is the "Tutor" that can help you increase the experience of your heroes and tutors. You can select your members and assign a "tutor" to gain daily XP in one skill.

You can use this mod to find more information about Train Your Clan.