Dexterity of unfinished tripod (4)
I believe the answer is:
ease
'dexterity' is the definition.
'unfinished tripod' is the wordplay.
'unfinished' means to remove the last letter.
'tripod' becomes 'easel' (easel is a kind of tripod).
'easel' with its last letter taken off is 'EASE'.
'of' is the link.
(Other definitions for ease that I've seen before include "Allay" , "Comfort and naturalness" , "Rest and leisure" , "Affluence" , "Lack of difficulty" .)