Shakespearean king left listener (4)
I believe the answer is:
lear
'shakespearean king' is the definition.
(King Lear)
'left listener' is the wordplay.
'left' becomes 'l' (common abbreviation).
'listener' becomes 'ear' (body part which hears or listens).
'l'+'ear'='LEAR'
(Other definitions for lear that I've seen before include "tragic hero" , "Tragedy" , "King -, Edward -" , "writer of comic verse" , "A real playful king" .)