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Greece: my next island hopping escape (9,4)

Ross

I believe the answer is:

emergency exit

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'greece' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

I don't understand the rest of the clue.

Can you help me to learn more?

(Other definitions for emergency exit that I've seen before include "Way out for use in dangerous situation" , "Way out in case of fire" , "Fast way out" , "It's Notausgang in German" , "Evacuation point" .)

I've seen this clue in The Times.
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