Attitude in estate, maybe one overwhelmed by anger (8)
I believe the answer is:
carriage
'attitude' is the definition.
(thesaurus)
'estate maybe one overwhelmed by anger' is the wordplay.
'estate maybe' becomes 'car' (estate is a type of car).
'one' becomes 'i' (Roman numeral).
'overwhelmed by' means one lot of letters goes inside another (inserted letters get absorbed or overwhelmed).
'anger' becomes 'rage' (rage is a kind of anger).
'i' placed inside 'rage' is 'riage'.
'car'+'riage'='CARRIAGE'
'in' is the link.
(Other definitions for carriage that I've seen before include "Vehicle - bearing" , "Conveyance, its cost" , "Deportment; vehicle" , "Bodily posture or wheeled vehicle" , "Transportation" .)