From opening that's inconclusive, white finally in superior position (5)
I believe the answer is:
above
'white finally in superior position' is the definition.
Both the definition and answer are adjectives. Maybe you can see an association between them that I can't see?
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for above that I've seen before include "On top of" , "Superior to" , "Higher than or over something" , "Too good for" , "Given earlier (in text)" .)