Crossword Genius

Misdirected soldier dropping rocks right on railway (3-4)

Ross

I believe the answer is:

off-line

I'm a little stuck... Click here to teach me more about this clue!

'misdirected soldier dropping rocks right on railway' is the definition.
I can't tell whether this definition defines the answer.

'misdirected soldier dropping rocks right on railway' is the wordplay.
I cannot quite understand how this works, but
'misdirected' could be 'off' and 'off' is present in the answer.
'railway' could be 'line' (line is a kind of railway) and 'line' is present in the answer.
No letters remain.
This may be the basis of the clue (or it may be nonsense).

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I've seen this clue in the Sydney Morning Herald.
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