Indication of caution linked to church room (7)
I believe the answer is:
chamber
'room' is the definition.
(I know that room can be written as chamber)
'indication of caution linked to church' is the wordplay.
'indication of caution' becomes 'amber' (I can't justify this - if you can you should give a lot more credence to this answer).
'linked to' says to put letters next to each other.
'church' becomes 'ch' (abbreviation on maps etc).
'amber' put after 'ch' is 'CHAMBER'.
Can you help me to learn more?
(Other definitions for chamber that I've seen before include "Room - part of a legislature" , "Official room" , "Compartment" , "Enclosed cavity, part of gun" , "Bedroom" .)