Fled hurriedly, shock treatment will divert (7)
I believe the answer is:
deflect
'divert' is the definition.
(thesaurus)
'fled hurriedly shock treatment' is the wordplay.
'hurriedly' indicates an anagram (writing too quickly, you might mix up letters).
'shock treatment' becomes 'ECT' (ECT is an example).
'fled' is an anagram of 'defl'.
'defl'+'ect'='DEFLECT'
'will' is the link.
(Other definitions for deflect that I've seen before include "Turn from straight course" , "Turn aside or deviate from course." , "change direction" , "Cause to go off course" , "Parry, turn aside" .)