Crossword Genius

Kind of arch exclamations? (4)

Ross

I believe the answer is:

ogee

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'kind of arch' is the definition.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for ogee that I've seen before include "bit of Gothic architecture?" , "S-shaped curve" , "S-shaped line" , "Leer" , "S-shaped moulding" .)

I've seen this clue in The Telegraph.
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