Crossword Genius

Inappropriate conviction concerning two criminals smuggling passport? (14)

Ross

I believe the answer is:

overconfidence

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

'two criminals smuggling passport?' is the definition.
I can't tell whether this defines the answer.

'inappropriate conviction' is the wordplay.
'inappropriate' becomes 'over' (I can't explain this - if you can you should believe this answer much more).
'conviction' becomes 'confidence' (I've seen this before).
'over'+'confidence'='OVERCONFIDENCE'

'concerning' is the link.

Can you help me to learn more?

(Other definitions for overconfidence that I've seen before include "Excessive self-assurance" , "An excess of self-assurance" .)

I've seen this clue in The Telegraph.
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