Is able to do half a dance (3)
I believe the answer is:
can
This clue might be a double definition.
'is able to' is the first definition.
(if you can do something you are able to do it)
'half a dance' is the second definition.
(I've seen this in another clue)
'do' acts as a link.
This may not be right. It may belong to one of the definitions.
Can you help me to learn more?
(Other definitions for can that I've seen before include "SECOND PART OF 10" , "sack from abroad" , "Billy" , "Cooler" , "Preserve fruit" .)