Mock, taunt (5)
I believe the answer is:
tease
This clue is a double definition.
'mock' is the first definition.
(teasing is a kind of mocking)
'taunt' is the second definition.
(I know that taunt can be written as tease)
(Other definitions for tease that I've seen before include "Rib, wind up" , "Poke fun at" , "Torment for fun" , "Use a comb" , "Banter, provoke gently" .)