Still turn up, very lost (5)
I believe the answer is:
inert
'still' is the definition.
(not moving)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for inert that I've seen before include "Like some gases" , "Sluggish, inactive" , "Sluggish, still" , "Motionless or lifeless" , "Unable to move or resist motion" .)