Typically, free name changes are given to people who are requesting a minor change to their name, such as invalid capitalization or a typing error. As you wish to just remove a clan tag from your name (the "DR0p" I assume), it may be minor enough for a member of staff to change it for you without the need of purchasing supporter status. Send a message to or tag a staff member and see what they say.
Apologies that it's taken so long for a member of staff to respond, but I can confirm what Nozzles is saying, if it's a minor change we are often lenient enough to change names. Feel free to message myself or another member of staff and we will aim to help however we can.