Newbie (4)
I believe the answer is:
tyro
'newbie' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for tyro that I've seen before include "New" , "Novice; Tory (anag.)" , "Neophyte" , "'Beginner, novice (4)'" , "Spell for rookie" .)