Central Ministry checks nine types of poison (10)
I believe the answer is:
strychnine
'types of poison' is the definition.
'strychnine' can be an answer for 'poison' (strychnine is a kind of poison). I'm unsure of the 'types of' bit.
'central ministry checks nine' is the wordplay.
'central ministry checks' becomes 'strych' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'strych'+'nine'='STRYCHNINE'
Can you help me to learn more?
(Other definitions for strychnine that I've seen before include "Bitter poison" , "Nice try, NHS (anag) -- highly poisonous compound" .)