Protrusion which, if cycling, gives an unpleasant feeling (8)

I believe the answer is:

overhang

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'protrusion' is the definition.
(thesaurus)

I don't understand how the remainder of the clue works.

(Other definitions for overhang that I've seen before include "Cast a shadow" , "Extend beyond (a roof, perhaps)" , "Loom above" , "Beetle, lean out beyond" , "Lean out - project" .)

I've seen this clue in The Guardian.

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