Crossword Genius

Sun block? (5)

Ross

I think it could be either:

Which length description are you looking for?:

5

7

cloud

'sun block?' is the definition.
(I've seen this in another clue)

This is all the clue.

(Other definitions for cloud that I've seen before include "Mass of airborne water vapour" , "Cover" , "Mass of water droplets" , "Source of rain" , "Make less transparent" .)

I've seen this clue in the LA Times and the Penny Press.
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