A very quiet centre adapted to accommodate one learner (10)
I believe the answer is:
apprentice
'one learner' is the definition.
(synonyms)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for apprentice that I've seen before include "Novice" , "new worker" , "Trainee" , "Learner" , "student" .)