Singer performing with love, entertaining millions (7)
I believe the answer is:
domingo
'singer' is the definition.
(I know that Domingo is a tenor)
'performing with love entertaining millions' is the wordplay.
'performing' becomes 'doing' ('do' can be a synonym of 'perform').
'with' means one lot of letters go next to another.
'love' becomes 'o' (love means zero in tennis).
'entertaining' is an insertion indicator.
'millions' becomes 'm' (abbreviation).
'doing'+'o'='doingo'
'doingo' going around 'm' is 'DOMINGO'.
(Other definitions for domingo that I've seen before include "Santo -, capital of Dominican Republic" , "Placido --, opera singer" , "Placido ... is popular tenor" , "Placido ......., one of the Three Tenors" .)