Uneasy as ever about its being returned (7)
I believe the answer is:
restive
'uneasy' is the definition.
(synonyms)
'ever about its being returned' is the wordplay.
'about' is an insertion indicator.
'being returned' is a reversal indicator.
'ever' placed around 'its' is 'evitser'.
'evitser' written backwards gives 'RESTIVE'.
'as' is the link.
(Other definitions for restive that I've seen before include "Unable to stay still" , "It veers around, resisting control" , "Impatient - jumpy" , "Uneasy, nervous" , "Impatient of authority" .)