Crossword Genius

They contradict their seniors (7)

Ross

I believe the answer is:

juniors

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

'seniors' is the definition.
The answer and definition can be both people as well as being plural nouns.
Maybe there's an association between them I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

(Another definition for juniors that I've seen is " They're lower in rank".)

I've seen this clue in the Evening Standard.
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