Curved shape (8)
'curved shape' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ellipse that I've seen before include "See pill (anag) - oval" , "Geometrical oval" , "Inclined plane through a cone" , "Shape - sell pie (anag)" , "Egg-shaped geometrical figure" .)
'curved shape' is the definition.
(I know that crescent is a type of curved shape)
This is the entire clue.
(Other definitions for crescent that I've seen before include "Shape of waxing or waning moon" , "Waxing process could show one" , "Phase of the moon" , "Shape of new moon" , "Growing" .)