Take rotten half-price pear away (5)
I believe the answer is:
filch
'take' is the definition.
(thesaurus)
'rotten half-price pear away' is the wordplay.
'rotten' indicates anagramming the letters.
'away' is a deletion indicator.
'half'+'price'='halfprice'
'halfprice' with 'pear' taken out is 'hlfic'.
'hlfic' with letters rearranged gives 'FILCH'.
(Other definitions for filch that I've seen before include "Purloin" , "Nick" , "Rob" , "Pinch, steal" , "Make off with what belongs to others" .)