Set of loaves? With no time, he produced scores (4)
I believe the answer is:
bach
'he produced scores' is the definition.
(the composer)
'set of loaves? with no time' is the wordplay.
'set of loaves?' becomes 'batch'.
'with no' is a deletion indicator.
'time' becomes 't' (abbreviation).
'batch' with 't' taken out is 'BACH'.
(Other definitions for bach that I've seen before include "Family of German composers" , "endearing Welsh appellation" , "musician" , "Brandenburg Concertos composer, d. 1750" , "musical great" .)