Strangely indirect aims to show prejudice (12)
I believe the answer is:
discriminate
'show prejudice' is the definition.
(I've seen this before)
'strangely indirect aims' is the wordplay.
'strangely' indicates an anagram.
'indirect'+'aims'='indirectaims'
'indirectaims' anagrammed gives 'DISCRIMINATE'.
'to' acts as a link.
(Other definitions for discriminate that I've seen before include "Perceive a distinction" , "Tell apart" , "Unjustly treat a group as different" , "Show taste" , "Understand the difference (between)" .)