Highly-motivated Democrat torn to shreds (6)
I believe the answer is:
driven
'highly-motivated' is the definition.
(I know this)
'democrat torn to shreds' is the wordplay.
I cannot really see how this works, but
'democrat' could be 'd' and 'd' is found in the answer.
'torn' could be 'riven' (I've seen this in another clue) and 'riven' is located in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for driven that I've seen before include "Urged or forced along" , "Forced, compelled" , "Determined" , "Urges or conveyed, perhaps in car" , "Given a lift" .)