A building; the church has one leased (6)
I believe the answer is:
Here is my best explanation:
'a building' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'the church has one leased' is the wordplay.
'the church' becomes 'ch' (common abbreviation).
'has' says to put letters next to each other.
'one' becomes 'a'.
'leased' becomes 'let'.
Can you help me to learn more?