Mock, ridicule (4)
I believe the answer is:
jeer
This clue is a double definition.
'mock' is the first definition.
(I've seen this before)
'ridicule' is the second definition.
(jeer is a kind of ridicule)
(Other definitions for jeer that I've seen before include "Gibe" , "Henry ---, Richard II's enemy, successor" , "Tease" , "Boo" , "Rude, mocking remark" .)