To make it easier initially, she immerses magnetic pole and removes iron from Dublin river (8)
I believe the answer is:
simplify
'to make it easier initially she immerses magnetic pole' is the definition.
I can't judge whether this definition defines the answer.
'removes iron from dublin river' is the wordplay.
'removes' becomes 'simp' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'iron' becomes 'fe' (Fe is the chemical symbol for iron).
'from' is a deletion indicator.
'dublin river' becomes 'liffey' (I've seen this before).
'liffey' with 'fe' taken away is 'lify'.
'simp'+'lify'='SIMPLIFY'
'and' is the link.
Can you help me to learn more?
(Other definitions for simplify that I've seen before include "Make less complex" , "Make easier or less complicated" , "Make accessible" , "Reduce in complexity" , "Streamline" .)