Read how to make purees (6)
I believe the answer is:
peruse
'read' is the definition.
(thesaurus)
'to make purees' is the wordplay.
'to make' indicates anagramming the letters.
'purees' with letters rearranged gives 'PERUSE'.
'how' is the link.
(Other definitions for peruse that I've seen before include "'Read through, browse (6)'" , "Thoroughly examine" , "Read attentively" , "Look over" , "Examine at length" .)