Dance alight (3,4)
I believe the answer is:
get down
This might be a double definition.
'dance' is the first definition.
The definition and answer can be both to do with motion as well as being verbs in their base form.
Maybe you can see a link between them that I can't see?
'alight' is the second definition.
(thesaurus)
Can you help me to learn more?
(Other definitions for get down that I've seen before include "Dismount, alight" , "you could - from duck" , "Swallow" , "See feathers, > alight" .)