Team built lead going crazy in final (8)
I believe the answer is:
ultimate
'final' is the definition.
('ultimate' can be similar in meaning to 'final')
'team built lead going crazy' is the wordplay.
'lead going' means to remove the first letter.
'crazy' is an anagram indicator.
'built' with its initial letter taken away is 'uilt'.
'team'+'uilt'='teamuilt'
'teamuilt' anagrammed gives 'ULTIMATE'.
'in' acts as a link.
(Other definitions for ultimate that I've seen before include "The last element of a series" , "something extreme" , "Eventual" , "Utmost; last" , "Last possible, final" .)