Organ having an audience — introduction to recital (5)
I believe the answer is:
liver
'organ' is the definition.
(liver is a kind of organ)
'having an audience introduction to recital' is the wordplay.
'having an audience' becomes 'live' (as in a live performance).
'introduction to' indicates taking the first letters (I've seen 'introductions to' mean this).
The initial letter of 'recital' is 'r'.
'live'+'r'='LIVER'
(Other definitions for liver that I've seen before include "Part of body" , "Internal organ" , "Vital organ" , "One extant" , "Bile-secreting organ" .)