Brought up message left inside for popstar, addressed using first name only (5)
I believe the answer is:
elton
'popstar addressed using first name only' is the definition.
I don't know anything about this answer so I can't judge whether it can be defined by this definition.
'brought up message left inside' is the wordplay.
'brought up' says the letters should be written backwards (in a down clue, letters go up).
'message' becomes 'note' (note is a kind of message).
'left' becomes 'l' (common abbreviation).
'inside' indicates putting letters inside.
'note' placed around 'l' is 'notle'.
'notle' reversed gives 'ELTON'.
'for' is the link.
Can you help me to learn more?
(Other definitions for elton that I've seen before include "..... Jonn (musician)" , "First name of singer/songwriter born Reginald Dwight in 1947" , "- John, British singer" , "Ben --; -- John" , ". . . . . John (musician)" .)