House in pain detailed on air (7)
I believe the answer is:
windsor
'house' is the definition.
(royal house)
'in pain detailed on air' is the wordplay.
'in pain' becomes 'sore' (I've seen this in another clue).
'detailed' means to remove the last letter (the word must be end-less or 'de-tailed').
'on' says to put letters next to each other.
'air' becomes 'wind'.
'sore' with its final letter taken away is 'sor'.
'sor' after 'wind' is 'WINDSOR'.
(Other definitions for windsor that I've seen before include "Noble family" , "Town with royal castle" , "Barbara" , "former German house?" , "Berkshire castle" .)