Ten beams will reveal conditions inside (1-4)
I believe the answer is:
x-rays
'conditions inside' is the definition.
The answer and definition can be both to do with communicating as well as being verbs in their -s form.
Perhaps there's an association between them I don't understand?
'ten beams' is the wordplay.
I cannot quite see how this works, but
'ten' could be 'x' (Roman numeral) and 'x' is found in the answer.
'beams' could be 'rays' (I've seen this before) and 'rays' is found in the answer.
This accounts for all the letters.
This may be the basis of the clue (or it may be nonsense).
'will reveal' is the link.
Can you help me to learn more?
(Other definitions for x-rays that I've seen before include "'Electromagnetic waves, for medical diagnosis say (1-4)'" , "Photos or exams made with kind of radiation" , "Medical photographs" , "Medical images" , "Electromagnetic waves, for medical diagnoses, say" .)