Barnum, perhaps (7)
I believe the answer is:
showman
'barnum perhaps' is the definition.
(I know that P. T. Barnum is a showman)
This is the entire clue.
(Other definitions for showman that I've seen before include "Entertainer" , "Circus proprietor" , "Person helping to present" , "Circus or fair manager" , "Impresario" .)