Entertainer stumped amid derisive hoot (6)
I believe the answer is:
jester
'entertainer' is the definition.
(jester is a kind of entertainer)
'stumped amid derisive hoot' is the wordplay.
'stumped' becomes 'st' (cricket abbreviation).
'amid' is an insertion indicator.
'derisive hoot' becomes 'jeer' (a jeer is mocking or disparaging sound).
'st' going into 'jeer' is 'JESTER'.
(Other definitions for jester that I've seen before include "one entertaining in court" , "Funny man in olden courts" , "Clown employed to entertain a ruler" , "Professional clown of the middle ages" , "Court entertainer (with bells on?)" .)