Eritrean trained family servant (8)
I believe the answer is:
retainer
'family servant' is the definition.
(I've seen this before)
'eritrean trained' is the wordplay.
'trained' is an anagram indicator (to train can mean to grow something into a shape).
'eritrean' with letters rearranged gives 'RETAINER'.
(Other definitions for retainer that I've seen before include "Fee paid for first option - old family servant" , "reduced rent" , "Eritrean as kind of servant" , "A money deposit or an old servant" , "money to be paid in advance" .)