Realised line may achieve the same as doing this? (6-3)

I believe the answer is:

tumble-dry

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'achieve the same as doing this?' is the definition.
I know nothing about this answer so I cannot judge whether it can be defined by this definition.

'realised line' is the wordplay.
'realised' becomes 'tumbled' (I can't explain this - if you can you should give a lot more credence to this answer).
'line' becomes 'ry' (abbreviation for railway).
'tumbled'+'ry'='TUMBLE-DRY'

'may' acts as a link.

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I've seen this clue in The Times.

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