To be all these is to be clumsy (6)
I believe the answer is:
thumbs
'to be all these is to be clumsy' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for thumbs that I've seen before include "Hitches a lift" , "Short thick digits" , "To be all these is to be clumsy" , "reads intensively" , "Digits; requests (lift)" .)