Loan broke the French up (6)
I believe the answer is:
rental
'loan' is the definition.
The answer and definition can be both related to property as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'broke the french up' is the wordplay.
'broke' becomes 'rent' (I can't justify this - if you can you should believe this answer much more).
'the french' becomes 'la' ('the' in French).
'up' says the letters should be written backwards (in down clue: letters go upwards).
'la' backwards is 'al'.
'rent'+'al'='RENTAL'
Can you help me to learn more?
(Other definitions for rental that I've seen before include "Let" , "Amount paid for hiring something" , "Payment to landlord" , "money for landlord" , "What's offered by a letter" .)