Lumpy old bed aunt moved out of bedroom initially (9)

I believe the answer is:

nodulated

'lumpy' is the definition.
(having nodules or lumps)

'old bed aunt moved out of bedroom initially' is the wordplay.
I cannot really see how this works, but
'old' could be 'late' (I've seen this in other clues) and 'late' is found within the answer.
'of' could be 'o' and 'o' is located in the answer.
This explanation may well be incorrect...

(Another definition for nodulated that I've seen is " Having abnormal growths".)

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