No longer referred to as enthusiastic (7)
I believe the answer is:
excited
'enthusiastic' is the definition.
(similar in meaning)
'no longer referred to' is the wordplay.
'no longer' becomes 'ex'.
'referred to' becomes 'cited' ('cite' can be a synonym of 'refer to').
'ex'+'cited'='EXCITED'
'as' is the link.
(Other definitions for excited that I've seen before include "With feelings roused, emotionally high" , "Stimulated" , "Hot" , "in agitated state" , "Worked up" .)