Blue cycling shoe boxes needed for dance parties (8)

'for dance parties' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.

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

'needed' is the link.

Can you help me to learn more?