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In honour of a police operation, raising one's glass (8)

Ross

I believe the answer is:

toasting

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'raising one's glass' is the definition.
(I've seen this before)

'in honour of a police operation' is the wordplay.
'in honour of' becomes 'to' (I can't justify this - if you can you should give a lot more credence to this answer).
'police operation' becomes 'sting' (I've seen this in another clue).
'to'+'a'+'sting'='TOASTING'

Can you help me to learn more?

(Other definitions for toasting that I've seen before include "Raising glasses" , "Raising one's glass" , "Drinking a health to" , "Browning" .)

I've seen this clue in The Telegraph.
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