Crossword Genius

Clean house, parking on top of building, sealed (9)

Ross

I believe the answer is:

dustproof

'sealed' is the definition.
(thesaurus)

'clean house parking on top of' is the wordplay.
'clean' becomes 'dust' (dust can mean to clean up dust).
'house' becomes 'roof' (I've seen this before).
'parking' becomes 'p' (abbreviation on road signs).
'on top of' is a charade indicator (letters next to each other).
'roof' put after 'p' is 'proof'.
'dust'+'proof'='DUSTPROOF'

'building' is the link.

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