clart

from The Collaborative International Dictionary of English v.0.48

Clart \Clart\, v. t. [Cf. Armor. kalar mud, mire, kalara to
   dirt, Sw. lort mud.]
   To daub, smear, or spread, as with mud, etc. [Prov. Eng.]
   --Halliwell.
   [1913 Webster]