See minx messed around with crossword setter (7)
I believe the answer is:
ximenes
'crossword setter' is the definition.
(Ximenes was an early crossword setter)
'see minx messed around' is the wordplay.
'messed around' indicates an anagram (I've seen 'messing around' mean this).
'see'+'minx'='seeminx'
'seeminx' with letters rearranged gives 'XIMENES'.
'with' is the link.
(Other definitions for ximenes that I've seen before include "Spanish grand inquisitor; see minx (anag.)" , "Spanish inquisitor - pseudonym of famous crossword setter" , "fearful cardinal" , "Grand Inquisitor and Archbishop of Toledo; see minx (anag.)" .)