Farsightedness dismissing rashness of one who can't stay still (6)
I believe the answer is:
fidget
'farsightedness dismissing rashness of one who can't stay still' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.
This is the entire clue.
Can you help me to learn more?
(Other definitions for fidget that I've seen before include "Make small nervous movements" , "Restless person" , "Make nervous restless movements" , "Gifted (anag.)" , "Move restlessly" .)