Crossword Genius

Special moment for you and me announced (4)

Ross

I believe the answer is:

hour

I'm a little stuck... Click here to teach me more about this clue!

'special moment' is the definition.
'hour' can be an answer for 'moment' (thesaurus). I am unsure of the 'special' bit.

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for hour that I've seen before include "A 24th of a day" , "See 20" , "3,600 seconds" , "Three thousand and six hundred seconds" , "60 14 acrosses" .)

I've seen this clue in The Guardian.
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