Sudden flash (of lightning) (6)
I believe the answer is:
streak
(Other definitions for streak that I've seen before include "Long thin mark" , "Long band" , "Move very fast; thin strip" , "run risk of arrest at sporting event?" , "Race" .)
I believe the answer is:
streak
(Other definitions for streak that I've seen before include "Long thin mark" , "Long band" , "Move very fast; thin strip" , "run risk of arrest at sporting event?" , "Race" .)