Crossword Genius

Terms of will revealing a pretty obvious clue? (4,8)

Ross

I believe the answer is:

dead giveaway

'pretty obvious clue?' is the definition.
(a dead giveaway is obvious or easy)

I can't explain the rest of the clue.

(Another definition for dead giveaway that I've seen is " easy to answer".)

I've seen this clue in The Guardian.
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