Sound chirpy pretty close to defeat (5)

I believe the answer is:

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'sound chirpy' is the definition.
'tweet' can be an answer for 'chirpy' (I've seen this before). I'm not certain of the 'sound' bit.

'pretty close to defeat' is the wordplay.
'pretty' becomes 'twee' (twee can mean cute or pretty).
'close to' says to take the final letters (the close of something is the end).
The last letter of 'defeat' is 't'.
'twee'+'t'='TWEET'

Can you help me to learn more?

(Other definitions for tweet that I've seen before include "Online communication" , "little message" , "delivered by a chirpy type?" , "call" , "Brief message" .)

I've seen this clue in The Independent.

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