Crossword Genius

Having less hair — bit rubbish? (10)

Ross

I believe the answer is:

balderdash

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'rubbish?' is the definition.
(I've seen this before)

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

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(Other definitions for balderdash that I've seen before include "cobblers > GAME" , "stupid talk" , "Nonsense" , "Senseless talk/writing" , "Rubbish" .)

I've seen this clue in The Independent.
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