Enthusiastic singer recalled (4)
I believe the answer is:
avid
'enthusiastic' is the definition.
(similar in meaning)
'singer recalled' is the wordplay.
'singer' becomes 'diva' (diva can mean a female opera singer).
'recalled' is a reversal indicator (to recall can mean to bring something back).
'diva' backwards is 'AVID'.
(Other definitions for avid that I've seen before include "Excessively keen" , "Mad for diva" , "hungry" , "Keenly interested" , "Fervent" .)