A broken romance (6)

I believe the answer is:

serial

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

'a broken romance' is the definition.
The definition and answer can be both related to communication as well as being singular nouns.
Maybe you can see an association between them that I don't see?

This is all the clue.

Can you help me to learn more?

(Other definitions for serial that I've seen before include "Set of TV shows" , "Continuous, perhaps like mulitple killer ( 6)" , "following a characteristic pattern" , "In regular succession without gaps" , "Consecutive, sequential" .)

I've seen this clue in the Evening Standard and The Globe and Mail.

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