Crossword Genius

Clutter in bed is not exactly permanent (14)

Ross

I believe the answer is:

indestructible

'permanent' is the definition.
(thesaurus)

'clutter in bed is not exactly' is the wordplay.
'not exactly' indicates an anagram.
'clutter'+'in'+'bed'+'is'='clutterinbedis'
'clutterinbedis' anagrammed gives 'INDESTRUCTIBLE'.

I've seen this clue in the Sydney Morning Herald.
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