Problem rewritten in quotes (8)
I believe the answer is:
question
'problem' is the definition.
(thesaurus)
'rewritten in quotes' is the wordplay.
'rewritten' indicates an anagram.
'in'+'quotes'='inquotes'
'inquotes' is an anagram of 'QUESTION'.
(Other definitions for question that I've seen before include "Ask; doubt" , "Enquiry; doubt" , "Pump" , ""To be or not to be", for example" , "Poser" .)