Crossword Genius

Only a personal impression but admissible as evidence (11)

Ross

I believe the answer is:

fingerprint

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

'evidence' is the definition.
(fingerprint is a kind of evidence)

'only a personal impression but admissible as' is the wordplay.
I cannot quite understand how this works, but
'impression' could be 'print' (impression created by a printer) and 'print' is present in the answer.
'as' could be 'in' (I've seen this in other clues) and 'in' is located in the answer.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

(Other definitions for fingerprint that I've seen before include "Dab" , "means of identification" , "Mark left by handler" .)

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