Shockingly, I retain passivity (7)
I believe the answer is:
inertia
'passivity' is the definition.
(lack of movement)
'shockingly i retain' is the wordplay.
'shockingly' is an anagram indicator.
'i'+'retain'='iretain'
'iretain' anagrammed gives 'INERTIA'.
(Other definitions for inertia that I've seen before include "Idling" , "Motionlessness" , "Sloth; inactivity" , "Unwillingness to move" , "Change-resisting tendency" .)