Bungle at the dance, supper's half off (5-2)
I believe the answer is:
balls-up
'bungle at' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Perhaps there's an association between them I don't understand?
'dance supper's half off' is the wordplay.
I cannot quite see how this works, but
'dance' could be 'ball' (ball is a kind of dance) and 'ball' is present in the answer.
The remaining letters 'sup' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
'the' is the link.
Can you help me to learn more?
(Another definition for balls-up that I've seen is " disaster".)