What does it?
It seems there is a bug for some minor group of people which doe's not properly rename "Settler" Clem to just "Clem" during the Vault-Rec Workshop Quest line.
This mod names Clem as Clem instead of Settler in that case.
Requires Vault-Tec Workshop DLC!

Does this work with...?
This Mod changes only Clem's name from Settler to Clem.
Maybe not compatible with other mod's that change Clem in any way.

What else?
Please tell me what you think about this, report bugs and so on.

Install:
Copy the "data" folder from the archive to your Fallout 4 directory.
If asked to overwrite, say yes.
Start Fallout 4, go to "Mods->loadorder" and make sure the files are activated.

Uninstall:
Delete the Settler_named_Clem.esp from your "...\Fallout 4\data" directory.