Framework rested upon change of date by county (8)

I believe the answer is:

bedstead

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'framework rested upon' is the definition.
I can't judge whether this definition defines the answer.

'change of date by county' is the wordplay.
'change of' indicates an anagram.
'by' is a charade indicator (letters next to each other).
'county' becomes 'beds' (I've seen this before).
'date' is an anagram of 'tead'.
'tead' put after 'beds' is 'BEDSTEAD'.

Can you help me to learn more?

(Other definitions for bedstead that I've seen before include "Frame used for supporting a mattress" , "Frame for sleepers" , "Mattress support" , "Framework supporting a sleeper" , "Frame upon which a mattress sits" .)

I've seen this clue in The Telegraph.

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