Discounts, perhaps without a squabble (6)

I believe the answer is:

hassle

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'a squabble' is the definition.
(I've seen this in another clue)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for hassle that I've seen before include "Informally annoy or bother" , "Irritating inconvenience" , "problem" , "Hound" , "Nuisance, bother" .)

I've seen this clue in The Telegraph.

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