A bad peach is of little worth (5)

I believe the answer is:

cheap

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'a bad' is the definition.
(thesaurus)

'peach is of little worth' is the wordplay.
'peach' can be anagrammed to 'CHEAP'.
Though, I'm not clear how this is indicated.

Can you help me to learn more?

(Other definitions for cheap that I've seen before include "Low in price or tastelessly showy" , "Budget -cheesy" , "Second-rate" , "Of very poor quality" , "Vulgar" .)

I've seen this clue in the Evening Standard.

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