Rural county: cars let out south of this place (13)
I believe the answer is:
herefordshire
'rural county' is the definition.
'herefordshire' can be an answer for 'county' (I've seen this before). I am not certain of the 'rural' bit.
'cars let out south of this place' is the wordplay.
'cars' becomes 'fords' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'let out' becomes 'hire'.
'south of' says to put letters next to each other (in a down clue, some letters go under others).
'this place' becomes 'here' (here in this location).
'fords'+'hire'='fordshire'
'fordshire' put after 'here' is 'HEREFORDSHIRE'.
Can you help me to learn more?
(Another definition for herefordshire that I've seen is " County".)