Church work -- I name composer (6)
I believe the answer is:
chopin
'composer' is the definition.
(Chopin is an example)
'church work i name' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'work' becomes 'op' (abbreviation for opus).
'name' becomes 'n' (common abbreviation e.g. on forms).
'ch'+'op'+'i'+'n'='CHOPIN'
(Other definitions for chopin that I've seen before include "Polish composer who had affair with George Sand" , "Polish virtuoso composer" , "Writer of music" , "Frederic ......, 19th century Polish composer, mostly for piano" , "Double centenarian" .)