Tossing thick caber, Aberdonian choked without support (8)
I believe the answer is:
restless
'tossing' is the definition.
(I've seen this in another clue)
'thick caber aberdonian choked without support' is the wordplay.
I cannot really see how this works, but
'without' could be 'less' (I've seen this in another clue) and 'less' is found within the answer.
'support' could be 'rest' (e.g. a shoulder rest is a support for shoulder) and 'rest' is present in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for restless that I've seen before include "Always on the move" , "Constantly moving about or fidgeting" , "Ill at ease" , "Uneasy, unable to relax" , "Fidgety - unable to sleep" .)