Important Tory dispersed prejudice (7)
I believe the answer is:
bigotry
'prejudice' is the definition.
(bigotry means prejudice or discrimination)
'important tory dispersed' is the wordplay.
'important' becomes 'big' (synonyms).
'dispersed' is an anagram indicator.
'tory' anagrammed gives 'otry'.
'big'+'otry'='BIGOTRY'
(Other definitions for bigotry that I've seen before include "Blind zeal" , "Intolerant prejudice" , "Intolerance, prejudice on grounds of religion" , "Stubborn prejudice" .)