Short online message from bird (5)
I believe the answer is:
tweet
'short online message' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for tweet that I've seen before include "Brief message" , "Twitter" , "Note of a small bird" , "Short message posted on the internet" , "Short online message" .)