Short road in Paris, one we French find disastrous (7)
I believe the answer is:
ruinous
'disastrous' is the definition.
(ruinous can mean disastrous or terrible)
'short road in paris one we french' is the wordplay.
'short' means to remove the last letter.
'road in paris' becomes 'rue' ('road' in French).
'one' becomes 'i' (Roman numeral).
'we french' becomes 'nous' ('we' in French).
'rue' with its last letter taken off is 'ru'.
'ru'+'i'+'nous'='RUINOUS'
'find' is the link.
(Other definitions for ruinous that I've seen before include "far too expensive" , "Broken down" , "Tumbledown - expensive" , "Destructive and causing downfall" , "ikely to cause harm" .)