Channel says you are heartbroken (7)

I believe the answer is:

urethra

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'channel' is the definition.
(I know that urethra is a type of channel)

'you are heartbroken' is the wordplay.
'you are' becomes 'ur' (text or internet abbreviation).
'heartbroken' becomes 'ethra' (anagram of 'heart').
'ur'+'ethra'='URETHRA'

'says' acts as a link.
I am not very happy about this link. It may be part of another bit of the clue.

Can you help me to learn more?

(Other definitions for urethra that I've seen before include "course of discharge" , "part of body" , "wee channel" , "Canal from the bladder" .)

I've seen this clue in The Guardian.

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