Bishop has composed chorale for a single man (8)
I believe the answer is:
bachelor
'a single man' is the definition.
'bishop has composed chorale' is the wordplay.
'bishop' becomes 'b' (abbreviation used in chess).
'has' is a charade indicator (letters next to each other).
'composed' indicates an anagram.
'chorale' anagrammed gives 'achelor'.
'b'+'achelor'='BACHELOR'
'for' is the link.
(Other definitions for bachelor that I've seen before include "Non-married male" , "Unmarried male" , "leading man at start of Wedding Cantata" , "Unmarried man (with a degree?)" , "Graduate" .)