Crawls like a tot (6)
I believe the answer is:
creeps
(Other definitions for creeps that I've seen before include "Moves silently and carefully" , "Moves slowly and stealthily" , "treads softly" , "Moves slowly - like servile people?" , "'''Tomorrow, and tomorrow, and tomorrow, ... in this petty pace from day to day'' (Shakespeare) (6)'" .)