Fidgety as ever, it’s moving about (7)
I believe the answer is:
restive
'fidgety' is the definition.
('restive' can be a synonym of 'fidgety')
'ever it's moving about' is the wordplay.
'moving about' indicates an anagram.
'ever'+'its'='everits'
'everits' anagrammed gives 'RESTIVE'.
'as' is the link.
(Other definitions for restive that I've seen before include "Impatient of authority" , "Unsettled" , "Resisting control, nervous or impatient" , "Impatient - jumpy" , "Unable to stay still" .)