Room in church getting colour (7)
I believe the answer is:
chamber
'room' is the definition.
(I know that room can be written as chamber)
'church getting colour' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'getting' is a charade indicator (letters next to each other).
'colour' becomes 'amber' (amber is a kind of colour).
'ch'+'amber'='CHAMBER'
'in' is the link.
(Other definitions for chamber that I've seen before include "Compartment" , "Bedroom" , "in which to get the bullet?" , "A formal room as for judge" , "Judicial assembly - room" .)