Range only changed for a greater duration (3,6)

I believe the answer is:

any longer

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'for a greater duration' is the definition.
I can't judge whether this definition defines the answer.

'range only changed' is the wordplay.
'changed' is an anagram indicator.
'range'+'only'='rangeonly'
'rangeonly' with letters rearranged gives 'ANY LONGER'.

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I've seen this clue in The Daily Express.

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