Roger is unharmed (3,5)

I believe the answer is:

all right

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This could be a double definition.

'roger' is the first definition.
(thesaurus)

'unharmed' is the second definition.
Both the definition and answer are adjectives. Maybe they are linked in a way I don't understand?

'is' is the link.

Can you help me to learn more?

(Other definitions for all right that I've seen before include "Completely one-sided" , "Nothing left" , "Passable" , "What's clearly acceptable" , "Very well, whatever you say" .)

I've seen this clue in the Evening Standard.

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