Tiresome English girl captivated by all of Paris (7)
I believe the answer is:
tedious
'tiresome' is the definition.
('tedious' can be a synonym of 'tiresome')
'english girl captivated by all of paris' is the wordplay.
'english' becomes 'e' (abbreviation).
'girl' becomes 'di'.
'captivated by' indicates putting letters inside.
'all of paris' becomes 'tous' ('all' in French).
'e'+'di'='edi'
'edi' going inside 'tous' is 'TEDIOUS'.
(Other definitions for tedious that I've seen before include "Long, slow, dull" , "drab" , "awfully boring" , "Dull as ditchwater" , "Wearisome, boring" .)