Clumsy jerk: GET IN LANE! (9)
I believe the answer is:
inelegant
'clumsy' is the definition.
(thesaurus)
'jerk get in lane' is the wordplay.
'jerk' is an anagram indicator.
'get'+'in'+'lane'='getinlane'
'getinlane' is an anagram of 'INELEGANT'.
(Other definitions for inelegant that I've seen before include "not the herb of grace?" , "Not stylish or refined" , "gauche" , "Awkward - graceless" , "Ungraceful" .)