Crossword Genius

Where to find data on unmarried people of one rank? (2,6,4)

Ross

I believe the answer is:

in single file

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

'where' is the definition.
Both the answer and definition are adverbs.
Maybe there's an association between them I don't understand?

'data on unmarried people of one rank?' is the wordplay.
I cannot quite understand how this works, but
'unmarried' could be 'single' (similar in meaning) and 'single' is located in the answer.
'one' could be 'i' (Roman numeral) and 'i' is found in the answer.
This explanation may well be incorrect...

'to find' is the link.

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I've seen this clue in The Globe and Mail.
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