Something a square peg can’t do (4)

I believe the answer is:

roll

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

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for roll that I've seen before include "Continuing success if one is on this" , "Move like a wheel" , "cylindrical moulding" , "Bread - list - drumbeats" , "Throw (a die or dice)" .)

I've seen this clue in the Evening Standard.

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