Old singer worth around million ultimately (6)
I believe the answer is:
prince
'old singer' is the definition.
'Prince' can be an answer for 'singer' (US musician). I'm unsure of the 'old' bit.
'worth around million ultimately' is the wordplay.
'worth' becomes 'cut price' (cut price is a kind of worth).
'around' says to take the centre.
'million ultimately' becomes 'ince' (I can't justify this - if you can you should give a lot more credence to this answer).
The centre of 'cutprice' is 'pr'.
'pr'+'ince'='PRINCE'
Can you help me to learn more?
(Other definitions for prince that I've seen before include "Canadian province" , "See 1" , "Boxer Naseem Hamed's "title"" , "He's a royal" , "Possible future titular head" .)