Yellowish light underneath church hall (7)
I believe the answer is:
chamber
'hall' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?
'yellowish light underneath church' is the wordplay.
'yellowish light' becomes 'amber' (I've seen this before. I am not sure about the 'yellowish' bit.).
'underneath' says to put letters next to each other (in a down clue, some letters go under others).
'church' becomes 'ch' (abbreviation on maps etc).
'amber' after 'ch' is 'CHAMBER'.
Can you help me to learn more?
(Other definitions for chamber that I've seen before include "Room where a judge transacts business" , "Room - part of a legislature" , "boudoir?" , "Official room" , "posh room" .)