Surviving tours United left jubilant (8)
I believe the answer is:
'jubilant' is the definition.
(I know that jubilant can be written as exultant)
'surviving tours united left' is the wordplay.
'surviving' becomes 'extant' (similar in meaning).
'tours' is an insertion indicator (to tour can mean to go around).
'united' becomes 'U' (abbreviation).
'left' becomes 'l' (common abbreviation).
'extant' placed around 'ul' is 'EXULTANT'.
(Other definitions for exultant that I've seen before include "Triumphantly elated" , "really happy" , "In jubilant mood, rejoicing" , "Rejoicing greatly, delighted" , "Triumphant" .)