From Guide to Missouri Confederate Units, 1861-1865 by James E. McGhee, page 69:
"This force attacked the Union outpost near Clark's Mill in Douglas County, Missouri, on November 7 (1865), procured its surrender after a short fight; captured 150 prisoners, 2 cannons, 200 stands of arms, a number of horses, and stores valued at nearly $40,000; and burned the enemy fortifications before leaving the area."

This book is what I believe is the best source of information on the Confederate forces in Missouri and their organization, battles, and movements.

By way of a Google search, I also found this article on the Battle:
http://www.watersheds.org/history/battle.htm