Plate from church overlooking city (6)
I believe the answer is:
chrome
'plate' is the definition.
(chroming is a kind of plating)
'church overlooking city' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'overlooking' means one lot of letters go next to another (down clues only).
'city' becomes 'rome' (Rome is an example**).
'ch'+'rome'='CHROME'
'from' is the link.
(Other definitions for chrome that I've seen before include "Protective finish on motor vehicle fittings" , "'Silvery metal, resists tarnishing (6)'" , "Shiny metallic coating" , "Feature of bath taps" , "used to make plate" .)