Bungling, clumsy (11)
I believe the answer is:
incompetent
I believe this clue is a double definition.
'bungling' is the first definition.
(I know that bungling can be written as incompetent)
'clumsy' is the second definition.
(I know that clumsy can be written as incompetent)
(Other definitions for incompetent that I've seen before include "Lacking ability" , "Inadequately skilled" , "Bungler" , "Lacking in necessary skills" , "Bungling" .)