Pragmatist will have no part in disgraceful sign (6)
I believe the answer is:
stigma
'disgraceful sign' is the definition.
(I've seen this before)
'pragmatist will have no part' is the wordplay.
I cannot quite understand how this works, but
'part' could be 'ti' (ti is a kind of part) and 'ti' is located in the answer.
This may be the basis of clue (or it may be nonsense).
'in' is the link.
Can you help me to learn more?
(Other definitions for stigma that I've seen before include "Disgraceful mark" , "Bad mark" , "A stain as on character" , "Mark of infamy or disgrace" , "Symbol of disgrace or infamy" .)