Slow student having a right turn! (5)
I believe the answer is:
largo
'slow' is the definition.
('largo' can be similar in meaning to 'slow')
'student having a right turn' is the wordplay.
'student' becomes 'l' (as in L-plates for learner drivers).
'having' says to put letters next to each other.
'a right' becomes 'ar' (I've seen this in other clues**).
'turn' becomes 'go' (a person's move in a board game).
'l'+'ar'+'go'='LARGO'
(Other definitions for largo that I've seen before include "moving slowly" , "Deliberately" , "at stately speed" , "Slow and dignified tempo in music" , "Slow passage" .)