Crossword Genius

They can be sweet between bedfellows (8)

Ross

I believe the answer is:

nothings

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

'they can' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I don't understand the remainder of the clue.

Can you help me to learn more?

I've seen this clue in The Hindu.
Want a hint initially instead of a full solution? Install my app