Kind of arch exclamations? (4)
I believe the answer is:
ogee
'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" .)