
1) Mud left in vehicle
Found on
https://www.crosswordclues.com/clue/clart

• (v. t.) To daub, smear, or spread, as with mud, etc.
Found on
http://thinkexist.com/dictionary/meaning/clart/
Clart transitive verb [ Confer Armor.
kalar mud, mire,
kalara to dirt, Swedish
lort mud.] To daub, smear, or spread, as with mud, etc. [ Prov. Eng.]
Halliwell. Found on
http://www.encyclo.co.uk/webster/C/87

Clart is British slang for trouble, a mess.
Found on
http://www.probertencyclopaedia.com/browse/ZC.HTM
No exact match found.