Half-hearted run leads to dance (5)
I believe the answer is:
galop
'dance' is the definition.
(I know that galop is a type of dance)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for galop that I've seen before include "dance music" , "Couple dance" , "Nineteenth-century dance" , "Lively ballroom dance" .)