Servant put up mistletoe, initially with help (9)
I believe the answer is:
housemaid
'servant' is the definition.
(I know that housemaid is a type of domestic)
'put up mistletoe initially with help' is the wordplay.
'put up' becomes 'house' (put up can mean to house or accommodate).
'initially' says to take the initial letters.
'with' means one lot of letters go next to another.
'help' becomes 'aid' (synonyms).
The first letter of 'mistletoe' is 'm'.
'house'+'m'+'aid'='HOUSEMAID'
(Other definitions for housemaid that I've seen before include "menial role" , "Help" , "girl with bad knee?" , "scrubber" .)