Joe, I'm changing image in text message (5)

I believe the answer is:

emoji

'image in text message' is the definition.
(an emoji is an image in online communication)

'joe i'm changing' is the wordplay.
'changing' indicates anagramming the letters.
'joe'+'im'='joeim'
'joeim' anagrammed gives 'EMOJI'.

(Another definition for emoji that I've seen is " Graphic expression".)

I've seen this clue in The Times.

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