Crossword Genius

They give personal details in depth (1-4)

Ross

I believe the answer is:

x-rays

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

'details in depth' is the definition.
The definition and answer can be both to do with communicating as well as being verbs in their -s form.
Perhaps there's a link between them I don't understand?

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for x-rays that I've seen before include "Penetrating radiation" , "Hospital photos" , "Photos or exams made with kind of radiation" , "'Electromagnetic waves, for medical diagnosis say (1-4)'" , "Short-wavelength radiation" .)

I've seen this clue in the Evening Standard.
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