Crescent (4)
'crescent' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arc that I've seen before include "part of turning circle?" , "A curve for Joan of . . ." , "Light" , "Curved section" , "Luminous electrical discharge" .)
'crescent' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for lune that I've seen before include "English river" , "River in Lancaster" .)