French pilgrimage site (7)
I believe the answer is:
lourdes
'french pilgrimage site' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for lourdes that I've seen before include "Famous centre of pilgrimage in SW France" , "French pilgrimage site" , "pilgrims' destination" , "Shrine in SW France" , "Place of pilgrimage in the French Pyrenees" .)