Composer to drive men to distraction (10)
I believe the answer is:
monteverdi
'composer' is the definition.
(Claudio Monteverdi, 1567-1643)
'drive men to distraction' is the wordplay.
'distraction' is an anagram indicator (I've seen this in other clues).
'drive'+'men'+'to'='drivemento'
'drivemento' is an anagram of 'MONTEVERDI'.
'to' is the link.
(Other definitions for monteverdi that I've seen before include "C Sixteen-Seventeen Italian composer (Orfeo)" , "Claudio --, 16th-17th century Italian composer" , "One composer" , "Claudio -, an early composer of operas" , "Italian scorer" .)