Dubious ism, doctrine I suspect that takes people the wrong way (12)
I believe the answer is:
misdirection
'that takes people the wrong way' is the definition.
(misdirection misleads people)
'dubious ism doctrine i suspect' is the wordplay.
'dubious' indicates anagramming the letters.
'suspect' is an anagram indicator (a suspicious or unusual spelling).
'ism' anagrammed gives 'mis'.
'doctrine'+'i'='doctrinei'
'doctrinei' with letters rearranged gives 'direction'.
'mis'+'direction'='MISDIRECTION'
(Other definitions for misdirection that I've seen before include "Sending the wrong way" , "Leading astray (of jury)" .)