Flickering light initially surrounding island disappears (7)
I believe the answer is:
lambent
'flickering' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for lambent that I've seen before include "Flickering like malt, Ben" , "Brilliant and light of wit" , "Softly bright or radiant; flickering" , "inflamed?" , "shedding some light" .)