Composer's rant with student (5)
I believe the answer is:
ravel
'composer's' is the definition.
(Maurice Ravel, 1875-1937)
'rant with student' is the wordplay.
'rant' becomes 'rave' (synonyms).
'with' says to put letters next to each other.
'student' becomes 'l' (as in L-plates for learner drivers).
'rave'+'l'='RAVEL'
(Other definitions for ravel that I've seen before include "Tangle or become tangled" , "Entangle - French composer, d. 1937" , "French composer, Maurice (1875-1937)" , "Make more complicated - French composer, d. 1937" , "He scored" .)