Care worker's flat support? (4,4)
I believe the answer is:
home help
'care worker's' is the definition.
(carer who provides help in someone's home)
'flat support?' is the wordplay.
'flat' becomes 'home' (flat is a type of home or residence).
'support?' becomes 'help' (to support someone is to help them).
'home'+'help'='HOME HELP'
(Other definitions for home help that I've seen before include "Person doing domestic chores for those in need" , "Social worker" , "Domestic support" , "Assister for the disabled" , "Domestic worker" .)