Greta Garbo dismissed rota for Peter the Tramp, for instance (6)

I believe the answer is:

beggar

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'tramp for instance' is the definition.
'beggar' can be an answer for 'tramp' (I've seen this before). I am not sure about the 'for instance' bit.

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for beggar that I've seen before include "Down-and-out" , "One may entreat you" , "poor chap" , "Mendicant or scrounger" , "Pauper or supplicant" .)

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

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