Elevator illuminated with loud interior (4)
I believe the answer is:
lift
'elevator' is the definition.
(I know that elevator can be written as lift)
'illuminated with loud interior' is the wordplay.
'illuminated' becomes 'lit' (synonyms).
'with loud' becomes 'f' (short for forte - 'loud' in music. I am not sure about the 'with' bit.).
'interior' is an insertion indicator.
'lit' enclosing 'f' is 'LIFT'.
Can you help me to learn more?
(Other definitions for lift that I've seen before include "Raise, elevate" , "Raise - shot in the arm" , "remove" , "Raise the vertical conveyor" , "It's an elevator in USA" .)