Crossword Genius

Yearn for quite a while? (4)

Ross

I believe the answer is:

long

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

'yearn' is the definition.
(I know that long is a is a more specific form of the action of yearn)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for long that I've seen before include "Pant" , "Thus having been treated by stretcher, perhaps" , "summer break?" , "Sustained" , "Protracted" .)

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