No mortal abode could be so lumpy (7)

I believe the answer is:

olympus

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'no mortal abode' is the definition.
Although both the answer and definition are singular nouns, I don't see how they can define each other.

'could be so lumpy' is the wordplay.
'could be' indicates anagramming the letters.
'so'+'lumpy'='solumpy'
'solumpy' is an anagram of 'OLYMPUS'.

Can you help me to learn more?

(Other definitions for olympus that I've seen before include "Mount of the ancient Greek gods" , "Mountain - dwelling place of the gods" , "Dwelling place of the Greek gods" , "Greece's highest mountain" , "In Greek myth, Mount ....... was home of the Gods" .)

I've seen this clue in The Globe and Mail.

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