Indistinct image? Time to make sudden utterance? (5)

I believe the answer is:

blurt

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'to make sudden utterance?' is the definition.
I can't tell whether this defines the answer.

'indistinct image? time' is the wordplay.
'indistinct image?' becomes 'blur' (I have seen 'Unfocused image ' mean 'blur' so perhaps 'image' could also mean 'blur'. I am not sure about the 'indistinct' bit.).
'time' becomes 't' (abbreviation).
'blur'+'t'='BLURT'

Can you help me to learn more?

(Other definitions for blurt that I've seen before include "Utter suddenly" , "Utter impulsively" .)

I've seen this clue in the Sydney Morning Herald.

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