Retainer or nurse kept by a French aunt without English (9)
I believe the answer is:
attendant
'retainer' is the definition.
(retainer can mean an attendant or servant)
'nurse kept by a french aunt without english' is the wordplay.
'nurse' becomes 'tend' (tend can mean to nurse or look after).
'kept by' indicates putting letters inside.
'french aunt' becomes 'tante' ('aunt' in French).
'without' suggests deleting specific letters.
'english' becomes 'E' (abbreviation as in OED).
'tante' with 'e' removed is 'tant'.
'a'+'tant'='atant'
'tend' going into 'atant' is 'ATTENDANT'.
'or' acts as a link.
(Other definitions for attendant that I've seen before include "One who helps" , "Page, e.g." , "One who waits upon" , "Lady-in-waiting" , "escort" .)