Regarding bed hopping, crossing capital abandoned (6,6)

I believe the answer is:

garden bridge

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'hopping crossing capital abandoned' is the definition.
I know nothing about this answer so I can't judge whether this works.

'regarding bed' is the wordplay.
'regarding bed' anagrams to 'GARDEN BRIDGE'.
But, I'm not clear how this is indicated.

Can you help me to learn more?

I've seen this clue in The Independent.

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