An eventuality that has no value for an independent organisation (6)
I believe the answer is:
entity
'an independent organisation' is the definition.
Although both the answer and definition are singular nouns, I can't see how they can define each other.
'an eventuality that has no value' is the wordplay.
'that has no' is a deletion indicator.
'eventuality' with 'value' taken away is 'ENTITY'.
'for' acts as a link.
Can you help me to learn more?
(Other definitions for entity that I've seen before include "A thing with distinct and independent existence" , "Something with independent existence" , "It exists as a seperate thing (6)" , "It exists as a separate thing" , "Anything that exists" .)