I furiously tear into further performance (9)
I believe the answer is:
iteration
'further performance' is the definition.
(an iteration is another performance of something)
'i furiously tear into' is the wordplay.
'furiously' indicates anagramming the letters (the letters move around energetically or furiously).
'tear'+'into'='tearinto'
'tearinto' anagrammed gives 'teration'.
'i'+'teration'='ITERATION'
(Other definitions for iteration that I've seen before include "Repeated performing" , "Repetition" , "Repeats" , "Reprise" , "Repeating" .)