Lorimer's lip (3)

I believe the answer is:

rim

I'm a little stuck... Click here to teach me more about this clue!

'lip' is the definition.
(I know that lip can be written as rim)

'lorimer's' is the wordplay.
'RIM' is hidden within the letters.
However, I'm unsure how this is indicated.

Can you help me to learn more?

(Other definitions for rim that I've seen before include "Edge - lip" , "Edge or margin" , "Top edge" , "Circular outer edge" , "Flange" .)

I've seen this clue in The Sun.

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