Affluence in some areas, eventually (4)
I believe the answer is:
ease
'affluence' is the definition.
(I've seen this before)
'in some areas eventually' is the wordplay.
'in' indicates the answer is hidden within the clue.
'EASE' is hidden in the letters of 'some areas eventually'.
(Other definitions for ease that I've seen before include "composure" , "Move gently or carefully" , "State of relaxation or rest" , "Comfort and naturalness" , "Leisure, relaxation" .)