Unattended vehicle's broken into in Paris: a damaged Ford (7-3)

'unattended' is the definition.
('uncared-for' can be similar in meaning to 'unattended')

'vehicle's broken into in paris a damaged ford' is the wordplay.
'vehicle's broken' becomes 'care' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'into' means one lot of letters goes inside another.
'in paris a' becomes 'un' ('a' in French).
'damaged' indicates anagramming the letters.
'ford' with letters rearranged gives 'dfor'.
'un'+'dfor'='undfor'
'care' put into 'undfor' is 'UNCARED-FOR'.