A fish for the home help (4)
I believe the answer is:
char
I believe this is a double definition.
'a fish' is the first definition.
(char is a kind of fish)
'the home help' is the second definition.
(char can mean a cleaner)
'for' is the link.
(Other definitions for char that I've seen before include "Cleaner - tea" , "Become black by burning" , "Overcook - fish - daily" , "Singe, scorch" , "tea > daily" .)