Servant; fee (8)
I believe the answer is:
retainer
I believe this is a double definition.
'servant' is the first definition.
(I know that servant can be written as retainer)
'fee' is the second definition.
(I know that retainer is a type of fee)
(Other definitions for retainer that I've seen before include "Eritrean (anag)" , "Family servant of long standing - fee charged in advance" , "Fee paid to book professional services" , "Fee could be the answer" , "reduced rent" .)