Warning of drink round around time (8)

I believe the answer is:

alerting

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'round around time' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps you can see a link between them that I can't see?

'warning of drink' is the wordplay.
'warning' becomes 'alert' (alert is a kind of warning).
'of drink' becomes 'ing' (I can't explain this - if you can you should believe this answer much more).
'alert'+'ing'='ALERTING'

Can you help me to learn more?

(Other definitions for alerting that I've seen before include "Warning" , "Notifying" .)

I've seen this clue in The Telegraph.

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