Crossword Genius

One bearing message whose view is one-sided? (8)

Ross

I believe the answer is:

postcard

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'one bearing message' is the definition.

I can't explain the remainder of the clue.

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(Other definitions for postcard that I've seen before include "Limited communication" , "Holiday communication" , "Brief message" , "Bringer of message" , "Holiday greeting" .)

I've seen this clue in The Sun and The Independent.
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