Religious teacher from Chartres regularly ignored Jesus? Not right (9)
I believe the answer is:
catechist
'religious teacher' is the definition.
(catechism is a method of religious teaching)
'ignored jesus? not right' is the wordplay.
'ignored' becomes 'cate' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'jesus?' becomes 'Christ' (Jesus Christ).
'not' indicates named letters should be taken away.
'right' becomes 'r' (common abbreviation).
'christ' with 'r' removed is 'chist'.
'cate'+'chist'='CATECHIST'
'from chartres regularly' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
(Other definitions for catechist that I've seen before include "One who puts questions" , "This religious teacher" .)