Troubles racialist oddly ignored (4)
I believe the answer is:
ails
'troubles' is the definition.
(as verb)
'racialist oddly ignored' is the wordplay.
'oddly ignored' indicates alternate letters.
The alternate letters of 'racialist' are 'AILS'.
(Other definitions for ails that I've seen before include "Troubles; afflicts" , "Is unwell - sail away" , "Is ill or uneasy - sail away" , "Is not well" , "Is sick" .)