Foreign duo's ban isn't uncommon (7)
I believe the answer is:
abounds
'isn't uncommon' is the definition.
I can't tell whether this definition defines the answer.
'foreign duo's ban' is the wordplay.
'foreign' indicates anagramming the letters (foreign order of the letters).
'duos'+'ban'='duosban'
'duosban' with letters rearranged gives 'ABOUNDS'.
Can you help me to learn more?
(Other definitions for abounds that I've seen before include "Is plentiful" , "Is all over the place" , "Exists in large numbers or amounts" , "Flourishes" , "Exists in large quantities" .)