One placed in cabinet and one in church (8)
I believe the answer is:
minister
'one placed in cabinet' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'one in church' is the wordplay.
'one' becomes 'i' (Roman numeral).
'in' means one lot of letters goes inside another.
'church' becomes 'minster' (minster is a kind of church).
'i' inserted inside 'minster' is 'MINISTER'.
'and' is the link.
Can you help me to learn more?
(Other definitions for minister that I've seen before include "Churchman" , "Tend" , "Clergyman - politician" , "Head of a government department" , "Attend to priest" .)