Rod's ideas changed in minor ways (4,5)

I believe the answer is:

side roads

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'minor ways' is the definition.
'side roads' can be an answer for 'ways' (side road is a kind of way). I am not sure about the 'minor' bit.

'rod's ideas changed' is the wordplay.
'changed' is an anagram indicator.
'rods'+'ideas'='rodsideas'
'rodsideas' anagrammed gives 'SIDE-ROADS'.

'in' is the link.

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I've seen this clue in The Daily Express.

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