Dancing on drugs (8)
I believe the answer is:
tripping
I believe this clue is a double definition.
'dancing' is the first definition.
(to trip is to dance or skip)
'on drugs' is the second definition.
(to trip is to experience drugs)
(Other definitions for tripping that I've seen before include "Stumbling" , "Missing a step and nearly falling" , "old-fashioned dancing" .)