Witch destroyed crosses without hesitation (9)
I believe the answer is:
Here is my best explanation:
'witch' is the definition.
'destroyed crosses without hesitation' is the wordplay.
'destroyed' indicates anagramming the letters.
'without' means one lot of letters goes inside another ('without' can be similar in meaning to 'outside').
'hesitation' becomes 'er'.
'crosses' anagrammed gives 'sorcess'.
'sorcess' going around 'er' is 'SORCERESS'.