Offering makes critic safe, but no tea! (9)
I believe the answer is:
sacrifice
'offering' is the definition.
(I have seen 'An offering ' mean 'sacrifice' so perhaps 'offering' could also mean 'sacrifice')
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for sacrifice that I've seen before include "Give up" , "Immolate" , "Killed offering to a deity" , "Renounce" , "Destroy" .)