Crossword Genius

High time? It could be! (5,4)

Ross

I believe the answer is:

happy hour

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'it could be' is the definition.
The definition suggests a singular noun which matches the answer.

'high time?' is the wordplay.
'high' becomes 'happy' (I am not sure about this - if you are sure you should believe this answer much more).
'time?' becomes 'hour' (unit of time).
'happy'+'hour'='HAPPY HOUR'

Can you help me to learn more?

(Other definitions for happy hour that I've seen before include "Cheap drinking time" , "Cheap time to get merry!" , "pub's promotion" , "Period of reduced prices in public bar" , "glasses are now reduced" .)

I've seen this clue in The Sun and The Times.
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