Nosey creature is unable to stand missing start of conversation (7)

I believe the answer is:

antbear

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'unable to stand missing start of conversation' is the definition.
I know nothing about this answer so I can't tell whether this works.

'nosey creature' is the wordplay.
'nosey' becomes 'ant' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'creature' becomes 'bear' (bear is a kind of creature).
'ant'+'bear'='ANTBEAR'

'is' acts as a link.

Can you help me to learn more?

(Another definition for antbear that I've seen is " Aardvark".)

I've seen this clue in The Guardian.

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