Occasionally subdued after making love below lecturer's room (8)
I believe the answer is:
latitude
'room' is the definition.
(thesaurus)
'occasionally subdued after making love below lecturer's' is the wordplay.
'occasionally' indicates alternate letters.
'after' is a charade indicator (letters next to each other).
'making love' becomes 'atit' (I've seen this before).
'below' is a charade indicator (letters next to each other).
'lecturer' becomes 'l'.
The alternating letters of 'subdued' are 'ude'.
'atit' after 'l' is 'latit'.
'ude' put after 'latit' is 'LATITUDE'.
(Other definitions for latitude that I've seen before include "of which people in Ecuador have very little" , "Liberality" , "Imaginary lines around the earth" , "Scope for freedom of action" , "lines on a map" .)