Registered (8)
'registered' is the definition.
(similar in meaning)
This is all the clue.
(Other definitions for enrolled that I've seen before include "on the books" , "being on board submarine?" , "Officially registered" , "Accepted into organisation" , "Admitted" .)
'registered' is the definition.
(entering is a kind of registering)
This is all the clue.
(Other definitions for entered that I've seen before include "moved in" , "Came in; recorded" , "Went in and registered as competitor" , "Put down" , "Enrolled or went in" .)