Solidest hall has become awfully outdated (2,3,2,3,5)
I believe the answer is:
as old as the hills
'awfully outdated' is the definition.
I know nothing about this answer so I cannot judge whether this works.
'solidest hall has become' is the wordplay.
'become' indicates anagramming the letters.
'solidest'+'hall'+'has'='solidesthallhas'
'solidesthallhas' anagrammed gives 'AS OLD AS THE HILLS'.
Can you help me to learn more?
I've seen this clue in the Sydney Morning Herald.
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