Slimy lair set out in the same way (9)

I believe the answer is:

similarly

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'out in the same way' is the definition.
Both the definition and answer are adverbs. Maybe you can see a link between them that I don't see?

'slimy lair set' is the wordplay.
'set' indicates an anagram (instruction to set the letters).
'slimy'+'lair'='slimylair'
'slimylair' is an anagram of 'SIMILARLY'.

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(Another definition for similarly that I've seen is " In like manner".)

I've seen this clue in The Daily Express.

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