Inducement to abandon English for French city, making measure of similarity (10)
I believe the answer is:
comparison
'measure of similarity' is the definition.
(a comparison measures how similar things are)
'inducement to abandon english for french city' is the wordplay.
I cannot really understand how this works, but
'city' could be 'paris' (Paris is an example) and 'paris' is found in the answer.
This explanation may well be incorrect...
'making' is the link.
(Other definitions for comparison that I've seen before include "Similarity" , "Process of identifying differences" , "The drawing of parallels" , "distinction" , "Analogy; likeness" .)