One of two in the McDonald's logo (4)

I believe the answer is:

arch

'one of two in the mcdonald's logo' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for arch that I've seen before include "Masonry structure for spanning an opening" , "Chief; bow" , "Vaulted opening" , "Consummate" , "Self-consciously playful or teasing" .)

I've seen this clue in the New York Times and the Universal.

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