Misty appearance of mass removed from whisked albumen (6)
I believe the answer is:
nebula
'albumen' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for nebula that I've seen before include "Interstellar gas cloud" , "Unable (anag)" , "Gas/dust cloud in space" , "Diffuse cloud of particles and gas in space" , "Bright patch in sky caused by distant galaxy" .)