Killer cited pies cooked another way (9)

I believe the answer is:

pesticide

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'killer' is the definition.
(thesaurus)

'cited pies cooked another way' is the wordplay.
'cited pies' can be anagrammed to 'PESTICIDE'.
But, I am not clear how this is indicated.

Can you help me to learn more?

(Other definitions for pesticide that I've seen before include "What eliminates bugs" , "From poison" , "Insect killer" , "It kills harmful creatures" .)

I've seen this clue in The Daily Express.

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