Show left to one man! (7)
I believe the answer is:
portray
'show' is the definition.
(to portray is to show or depict)
'left to one man' is the wordplay.
'left' becomes 'port' (left side of a ship - opposite of starboard).
'to one man' becomes 'Ray' (Man Ray was a 20th-century artist).
'port'+'ray'='PORTRAY'
(Other definitions for portray that I've seen before include "sketch" , "Show" , "Delineate" , "Use words to describe" , "Depict in art" .)