Land found by swan swimming with boat (8)
I believe the answer is:
botswana
'land' is the definition.
(I know that Botswana is African country)
'swan swimming with boat' is the wordplay.
'swimming with' indicates anagramming the letters (letters swim around into a new order).
'swan' with its letters mixed up with 'boat' makes 'BOTSWANA'.
'found by' acts as a link.
(Other definitions for botswana that I've seen before include "African country, setting for "The No. 1 Ladies' Detective Agency"" , "Boa wasn't found out in the Africa" , "Boa wasn't found in the African state" , "Boa wasn't taken out in the African state" , "Does Santa bow awkwardly to the African state?" .)