Rubbish tango -- stumble and sway (7)
I believe the answer is:
twaddle
'rubbish' is the definition.
(I've seen this in another clue)
'tango stumble and sway' is the wordplay.
I cannot really see how this works, but
'tango' could be 't' (phonetic alphabet: alpha, bravo, charlie etc.) and 't' is found within the answer.
The remaining letters 'waddle' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for twaddle that I've seen before include "Foolish words" , "Senseless talk" , "Rubbish" , "Hot air" , "Piffle" .)