Bore in one Parisian river (9)
I believe the answer is:
underwent
'bore' is the definition.
(past tense of 'bear', to undergo)
'one parisian river' is the wordplay.
'one' becomes 'un' (northern English dialect form of 'one').
'parisian river' becomes 'derwent' (River Derwent in Derbyshire. I am not sure about the 'parisian' bit.).
'un'+'derwent'='UNDERWENT'
'in' acts as a link.
Can you help me to learn more?
(Other definitions for underwent that I've seen before include "Experienced; bore" , "Was subjected to" .)