Chirrup; message (5)

I believe the answer is:

This clue is a double definition.

'chirrup' is the first definition.
(I know that chirrup can be written as tweet)

'message' is the second definition.
(type of online message)

(Other definitions for tweet that I've seen before include "Message of up to 140 characters" , "online comment" , "Message from Trump?" , "(Make a) chirping noise" , "Twitter" .)

I've seen this clue in The Telegraph.

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