In aeroplane, cried ... "Surrounded by 1930s music" (9)

'in aeroplane cried surrounded by 1930s music' is the definition.
I can't tell whether this definition defines the answer.

'cried surrounded by 1930s music' is the wordplay.
'cried' becomes 'wept' ('weep' can be a synonym of 'cry').
'surrounded by' means one lot of letters goes inside another.
'w9n0s' becomes 's'.
'music' becomes 'wing' (I can't justify this - if you can you should believe this answer much more).
's'+'wing'='swing'
'wept' going inside 'swing' is 'SWEPTWING'.

Can you help me to learn more?