Blackmail material to strike down MP with: corruption involving mother (9)

'blackmail material' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'strike down mp with corruption involving mother' is the wordplay.
'strike down' becomes 'ko' (I am not sure about this - if you are sure you should believe this answer much more).
'with' means one lot of letters go next to another.
'corruption' becomes 'rot' (rot can mean corruption or decay).
'involving' means one lot of letters goes inside another.
'mother' becomes 'ma' (ma can mean mother).
'rot' placed around 'ma' is 'romat'.
'ko'+'mp'+'romat'='KOMPROMAT'

'to' acts as a link.

Can you help me to learn more?