Crossword Genius

Long spanner right for bed needing adjustment (5,6)

Ross

I believe the answer is:

forth bridge

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'long spanner' is the definition.
I know nothing about this answer so I can't tell whether this works.

'right for bed needing adjustment' is the wordplay.
'needing adjustment' is an anagram indicator.
'right'+'for'+'bed'='rightforbed'
'rightforbed' with letters rearranged gives 'FORTH BRIDGE'.

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I've seen this clue in The Telegraph.
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