Crossword Genius

Looking backwards through bifocals, can be found misleading (3)

Ross

I believe the answer is:

fib

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'looking backwards through bifocals can' is the definition.
The answer and definition can be both related to communication as well as being singular nouns.
Perhaps there's an association between them I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for fib that I've seen before include "A harmless white lie" , "minor piece of fiction" , "Story" , "One must be 20 [UNTRUE]" , "Petty falsehood" .)

I've seen this clue in the Evening Standard.
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