Still lost, in some confusion (10)
I believe the answer is:
motionless
'still' is the definition.
(I know that still can be written as motionless)
'lost in some confusion' is the wordplay.
'confusion' indicates anagramming the letters.
'lost'+'in'+'some'='lostinsome'
'lostinsome' is an anagram of 'MOTIONLESS'.
(Other definitions for motionless that I've seen before include "constipated?" , "Immobile" , "Inert" , "not having anything to vote about?" , "Still, unmoving" .)