Fellow student has spoken of flowers (6)
I believe the answer is:
floral
'of flowers' is the definition.
(I've seen this before)
'fellow student has spoken' is the wordplay.
'fellow' becomes 'f' (abbreviation - of a society etc.).
'student' becomes 'L' (as in L-plates for learner drivers).
'has' says to put letters next to each other.
'spoken' becomes 'oral' (similar in meaning).
'f'+'l'+'oral'='FLORAL'
(Other definitions for floral that I've seen before include "with pretty plants?" , "Decorated with flowers" , "bouquet" , "Of flowers, like wreath" , "could it be to do with naked ladies?" .)