Mocking smiles (6)
I believe the answer is:
sneers
'mocking smiles' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for sneers that I've seen before include "Contemptuous or scornful remarks" , "Jeers, derides" , "Shows scorn" , "Shows contempt by scornful expression" , "Makes scornful remark, derides" .)