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In southern Crete, perhaps, is there such service? (6)

Ross

I believe the answer is:

secret

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'there such service?' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'in southern crete perhaps' is the wordplay.
'in southern' becomes 's' (abbreviation. I am not sure about the 'in' bit.).
'perhaps' indicates anagramming the letters.
'crete' anagrammed gives 'ecret'.
's'+'ecret'='SECRET'

'is' is the link.

Can you help me to learn more?

(Other definitions for secret that I've seen before include "Confidential (information)" , "avoiding exposure" , "Not public" , "Confidential or mysterious" , "Not to be disclosed" .)

I've seen this clue in the Evening Standard.
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