Crossword Genius

Young listener's age (3)

Ross

I believe the answer is:

ten

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

'age' is the definition.
(ten years old is an age)

'young listener's' is the wordplay.
'TEN' is hidden within the letters.
However, I am not sure how the hidden word is indicated.

Can you help me to learn more?

(Other definitions for ten that I've seen before include "No of sides of a decagon" , "Cardinal number" , "time" , "Very young" , "Five times two" .)

I've seen this clue in the Evening Standard.
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