Benefit one writing cheque returned (6)

I believe the answer is:

reward

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'benefit one' 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 can't explain the rest of the clue.

Can you help me to learn more?

(Other definitions for reward that I've seen before include "Gift in recognition of achievement" , "Earned prize" , "Bounty for, eg, capturing outlaw" , "Bounty; recompense" , "Money offered for info" .)

I've seen this clue in The Telegraph.

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