Regions covered by care assistant (5)
I believe the answer is:
areas
'regions' is the definition.
('area' can be a synonym of 'region')
'covered by care assistant' is the wordplay.
'covered by' indicates the answer is hidden within the clue.
'AREAS' is hidden in the letters of 'care assistant'.
(Other definitions for areas that I've seen before include "Spaces covered by two-dimensional surfaces" , "Zones" , "Geographical regions" , "Localities" , "Places" .)