Right doctrine confused i.e. Mrs Mop at first (11)
I believe the answer is:
thatcherism
'right doctrine' is the definition.
I know nothing about this answer so I can't tell whether this works.
'confused i e mrs mop at first' is the wordplay.
'confused' indicates an anagram.
'mop' becomes 'thatch' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'at first' means one lot of letters go next to another.
'i'+'e'+'mrs'='iemrs'
'iemrs' is an anagram of 'erism'.
'erism' put after 'thatch' is 'THATCHERISM'.
Can you help me to learn more?
(Another definition for thatcherism that I've seen is " Political philosophy of the Iron Lady".)