One who doesn't keep up (9)
I believe the answer is:
straggler
(Other definitions for straggler that I've seen before include "One lingering behind" , "Lingerer" , "he's in no hurry" , "One not keeping up" , "Someone falling behind" .)
I believe the answer is:
straggler
(Other definitions for straggler that I've seen before include "One lingering behind" , "Lingerer" , "he's in no hurry" , "One not keeping up" , "Someone falling behind" .)