Crossword Genius

Near fine upper class (3-3)

Ross

I believe the answer is:

top hat

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

'upper class' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'near fine' is the wordplay.
'near' becomes 'to' (to can mean near or close to).
'fine' becomes 'phat' (I've seen this before).
'to'+'phat'='TOP-HAT'

Can you help me to learn more?

(Other definitions for top hat that I've seen before include "Formal headgear for man" , "Formal headgear of lofty sort" , "Example of elegance" , "Formal head-wear for a man" , "Headgear (for those in tails?)" .)

I've seen this clue in The Telegraph.
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