Highly enlightened board's accepted deal finally and settled (8)
I believe the answer is:
floodlit
'highly enlightened board's accepted' is the definition.
I can't tell whether this defines the answer.
'deal finally and settled' is the wordplay.
'deal finally' becomes 'flood' ('flood' can be a synonym of 'deal'. I am not sure about the 'finally' bit.**).
'and' is a charade indicator (letters next to each other).
'settled' becomes 'lit' (I've seen this before).
'flood'+'lit'='FLOODLIT'
Can you help me to learn more?
(Other definitions for floodlit that I've seen before include "was intensely illuminating" , "late-night play?" , "Artificially illuminated" , "Brightly illuminated" , "Match may be" .)