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Child and friend stone cold (7)

Ross

I believe the answer is:

totally

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'child and friend stone cold' is the definition.
I can't judge whether this definition defines the answer.

'child and friend' is the wordplay.
'child' becomes 'tot' (term for a young child).
'and' says to put letters next to each other.
'friend' becomes 'ally' (an ally is a friend or supporter).
'tot'+'ally'='TOTALLY'

Can you help me to learn more?

(Other definitions for totally that I've seen before include "in every respect" , "Wholly" , "without reservation" , "without reserve" , "Altogether" .)

I've seen this clue in The Times and The Sunday Times.
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