Promoted story about potassium dump - mass dumping! (6,2)

'promoted' is the definition.
I know nothing about this answer so I can't tell whether this works.

'story about potassium dump mass dumping' is the wordplay.
'story' becomes 'tale' (synonyms).
'about' means one lot of letters goes inside another.
'potassium' becomes 'K' (K is the chemical symbol for potassium).
'mass' becomes 'm' (symbol used in Physics e.g. f=ma).
'dumping' indicates named letters should be taken away.
'dump' with 'm' taken out is 'dup'.
'tale' enclosing 'k' is 'talke'.
'talke'+'dup'='TALKED UP'

Can you help me to learn more?