As nursing hospital reveals symptoms of illness? (5)
I believe the answer is:
Here is my best explanation:
'symptoms of illness?' is the definition.
'aches' can be an answer for 'symptoms' (ache is a kind of symptom). I am not sure about the 'of illness?' bit.
'as nursing hospital' is the subsidiary indication.
'nursing' indicates putting letters inside.
'hospital' becomes 'che' (I can't explain this - if you can you should give a lot more credence to this answer).
'as' placed around 'che' is 'aches'.
'reveals' is the link.
(Other definitions for aches that I've seen before include "Dull prolonged pains", "sign of suffering", "Continuous pains", "Hurts; yearns", "Constant pains", "Pains, hurts", "Dull persistent pains", "Gives a dull pain", "Yearns" and "discomfort".)