Room in church with a yellow light (7)
I believe the answer is:
chamber
'room' is the definition.
(I know that chamber is a type of room)
'church with a yellow light' is the wordplay.
'church' becomes 'ch' (abbreviation on maps etc).
'with' means one lot of letters go next to another.
'a yellow light' becomes 'amber' (I've seen this before. I am not sure about the 'yellow' bit.).
'ch'+'amber'='CHAMBER'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for chamber that I've seen before include "Room for the judge or the bed" , "Room where a judge transacts business" , "A formal room as for judge" , "Bedroom" , "Large room" .)