Cretan sort of stupor (6)
I believe the answer is:
trance
'stupor' is the definition.
(I've seen this in another clue)
'cretan sort' is the wordplay.
'sort' indicates anagramming the letters.
'cretan' with letters rearranged gives 'TRANCE'.
'of' is the link.
(Other definitions for trance that I've seen before include "State of a medium in a seance" , "state of mind" , "kind of altered state" , "Canter in dream-state" , "State or period of unconsciousness" .)