Sensitive of Parisian to tell tale about pet (8)
I believe the answer is:
delicate
'sensitive' is the definition.
(similar in meaning)
'of parisian to tell tale about pet' is the wordplay.
'of parisian' becomes 'de' ('of' in French).
'to tell tale' becomes 'lie' (telling tales means lying).
'about' means one lot of letters goes inside another.
'pet' becomes 'cat' (cats are often kept as pets).
'lie' placed around 'cat' is 'licate'.
'de'+'licate'='DELICATE'
(Other definitions for delicate that I've seen before include "Not robust" , "Weak" , "ticklish!" , "Dainty - fragile" , "Soft" .)