Glass edge (3)

I believe the answer is:

rim

'glass edge' is the definition.
(I've seen this in another clue)

This is the entire clue.

(Other definitions for rim that I've seen before include "Edge or margin" , "Circular outer edge" , "An edge, canyon or cup" , "Flange" , "Upper or outer edge" .)

I've seen this clue in the Penny Press, The Washington Post, the LA Times and the King Feature Syndicate.

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