Mocking or scornful, sneering (8)

I believe the answer is:

sardonic

I believe this is a double definition.

'mocking or scornful' is the first definition.
(I've seen this before)

'sneering' is the second definition.
(I've seen this before)

(Other definitions for sardonic that I've seen before include "Derisively ironic" , "Tart" , "Mocking or scornful" , "Heartless and bitter" , "Dry, cynically mocking" .)

I've seen this clue in The Irish Times.

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