I am up in easily managed abode (8)
I believe the answer is:
domicile
'abode' is the definition.
('domicile' can be a synonym of 'abode')
'i am up in easily managed' is the wordplay.
'i am' becomes 'im'.
'up' shows that the letters should be reversed in order (in down clue: letters go upwards).
'in' indicates putting letters inside.
'easily managed' becomes 'docile' (I've seen this before).
'im' in reverse letter order is 'mi'.
'mi' inserted into 'docile' is 'DOMICILE'.
(Other definitions for domicile that I've seen before include "Country of residence" , "A person's principal home" , "A person's place of residence" , "Legal place of residence" , "One's permanent residence" .)