A composer - some clever Dick! (5)
I believe the answer is:
verdi
'a composer' is the definition.
(Giuseppe Verdi 1813-1901)
'some clever dick' is the wordplay.
'some' indicates the answer is hidden within the clue (some parts of the word are used).
'VERDI' is hidden within 'clever dick'.
(Other definitions for verdi that I've seen before include "Composer of opera ''Rigoletto''" , "Drive like composer of operas" , "Italian opera composer" , "Giuseppe _____, composer of "La Traviata"" , "Composer of the operas Macbeth, Falstaff" .)