Sexism may be regularly sparked by vodka essence in non-alcoholic drink (9)
I believe the answer is:
prejudice
'sexism' is the definition.
(thesaurus)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for prejudice that I've seen before include "Bias" , "Intolerance" , "Influence (someone's) opinion in advance" , "Bigotry" , "Make biased" .)