Heater hurt Ned, we discover. Is really not well (5,3,7)
I believe the answer is:
under the weather
'heater hurt ned we discover is really not well' is the definition.
I know nothing about this answer so I cannot tell whether it can be defined by this definition.
'heater hurt ned we discover is really not well' is the wordplay.
'heater hurt ned we' anagrams to 'UNDER THE WEATHER'.
But, I'm not clear how this is indicated.
Can you help me to learn more?
(Other definitions for under the weather that I've seen before include "Seedy" , "where you have to look for this crossword?" , "Out of sorts" , "Sick" , "Sickening" .)