Check pectin's set (7)
I believe the answer is:
inspect
'check' is the definition.
(thesaurus)
'pectin's set' is the wordplay.
'set' is an anagram indicator (instruction to set the letters).
'pectins' anagrammed gives 'INSPECT'.
(Other definitions for inspect that I've seen before include "Examine closely" , "Examine officially" , "Scrutinize, audit" , "Scan" , "Scrutinise" .)