Cross about theologian's bewilderment (6)
I believe the answer is:
muddle
'bewilderment' is the definition.
(thesaurus)
'cross about theologian's' is the wordplay.
'cross' becomes 'mule' (I've seen this before**).
'about' indicates putting letters inside.
'theologian' becomes 'dd' (Doctor of Divinity degree).
'mule' going around 'dd' is 'MUDDLE'.
(Other definitions for muddle that I've seen before include "disorderly state of affairs" , "Confused mess" , "[OPPOSITE OF] clear" , "Confusion - mess" , "mix-up" .)