Tries again, close to tee, to practise (8)
I believe the answer is:
rehearse
'practise' is the definition.
('rehearse' can be a synonym of 'practise')
'tries again close to tee' is the wordplay.
'tries again' becomes 'rehears' ('hears' can be a synonym for 'tries' so perhaps 'rehears' is OK for 'tries again').
'close to' says to take the final letters (the close/ending of).
The last letter of 'tee' is 'e'.
'rehears'+'e'='REHEARSE'
'to' acts as a link.
(Other definitions for rehearse that I've seen before include "Practise parts" , "Practise before a public performance" , "Practice for the performance" , "Recite - try out" , "Go over" .)