Crossword Genius

They maybe drop hints, surprisingly concealing evidence of doubt (5,6)

Ross

I believe the answer is:

third person

I'm a little stuck... Click here to teach me more about this clue!

'evidence of doubt' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe you can see a link between them that I don't see?

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for third person that I've seen before include "reason for an eternal triangle" , "stopped by Ancient Mariner?" , "will suggest PC title for Greene novel?" , "Maybe they" , "could be murderer" .)

I've seen this clue in The Times.
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