Side of pastrami without pasta (3)

I believe the answer is:

rim

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'side' is the definition.
(rim is a kind of side)

I can't explain the rest of the clue.

(Other definitions for rim that I've seen before include "Outer edge of a wheel" , "Edge or margin" , "Edge, border" , "An edge, canyon or cup" , "Raised edge of a round object" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

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