Romantic name for a village Green (6)

I believe the answer is:

gretna

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'romantic name' is the definition.
'Gretna' can be an answer for 'name'. I am unsure of the 'romantic' bit.

I cannot understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for gretna that I've seen before include "... Green, for elopers" , "border village" , "Green for eloping couples" , "Scottish town" .)

I've seen this clue in the Evening Standard.

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