Blue cycling shoe boxes needed for dance parties (8)

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

'blue cycling shoe boxes' is the wordplay.
'blue' becomes 'down' (both can mean sad).
'cycling' indicates anagramming the letters.
'boxes' means one lot of letters goes inside another (the outside letters must 'box' inside letters in).
'shoe' is an anagram of 'hoes'.
'down' going inside 'hoes' is 'HOEDOWNS'.

'needed' acts as a link.

Can you help me to learn more?