Rubbish former tennis player visits America (7)
I believe the answer is:
useless
'rubbish' is the definition.
'former tennis player visits america' is the wordplay.
'former tennis player' becomes 'seles' (Monica Seles).
'visits' indicates putting letters inside (visit can mean to go into).
'america' becomes 'us' (abbreviation for the United States).
'seles' inserted into 'us' is 'USELESS'.
(Other definitions for useless that I've seen before include "Good-for-nothing" , "Futile and unavailing" , "Having no benefical function" , "Without purpose" , "Of no practical application, not worth keeping" .)