Crossword Genius

Test confidence without restraining me (4)

Ross

I believe the answer is:

oral

'test' is the definition.
(oral is a type of examination)

I cannot understand how the remainder of the clue works.

(Other definitions for oral that I've seen before include "Kind of examination" , "Relating to speech" , "Related to the mouth" , "Vocal test" , "Spoken test" .)

I've seen this clue in The Guardian.
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