A Welsh female maybe “catty” in a certain way? (7)
I believe the answer is:
persian
'catty in a certain way?' is the definition.
(as in Persian cats)
'a welsh female' is the wordplay.
'a' becomes 'per' (eg 'one a day' means 'one per day').
'welsh female' becomes 'Sian' (common Welsh name).
'per'+'sian'='PERSIAN'
'maybe' acts as a link.
(Other definitions for persian that I've seen before include "Type of cat or carpet" , "Breed of cat" , "From Iran?" , "Long-haired cat" , "Iranian language" .)