Crossword Genius

Partial duplication of travel document is concerning (3-1-3)

Ross

I believe the answer is:

vis-a-vis

'is concerning' is the definition.

I don't understand the remainder of the clue.

(Other definitions for vis-a-vis that I've seen before include "Facing; in relation to" , "In relation to, as compared with" , "Face-to-face" , "With regard to" .)

I've seen this clue in The Times.
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