Lazy, lacking ambition (9)
I believe the answer is:
shiftless
I believe this is a double definition.
'lazy' is the first definition.
(synonyms)
'lacking ambition' is the second definition.
(I've seen this in another clue)
(Other definitions for shiftless that I've seen before include "Lazy - indolent" , "Like an automatic American car" , "lacking in initiative" , "Idle" .)