Cloud of interstellar gases and dust (6)

I believe the answer is:

nebula

(Other definitions for nebula that I've seen before include "Gas/dust cloud in space" , "Unable (anag)" , "Mist of gas or stars in the night sky" , "Hazy light; a slight cloudiness" , "Unable to find patch in the sky" .)

I've seen this clue in the Sydney Morning Herald.

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