Question dancer's choice of footwear (4)
I believe the answer is:
pump
This might be a double definition.
'question dancer's choice' is the first definition.
'pump' can be an answer for 'question' (pumping is a kind of questioning). I'm not certain of the 'dancer's choice' bit.
'footwear' is the second definition.
(pump is a kind of footwear)
'of' is the link.
Can you help me to learn more?
(Other definitions for pump that I've seen before include "Empty" , "Fire bullets rapidly" , "Raise liquid or air" , "Shoe - inflating device" , "Machine for moving liquids or gases" .)