Clears cellars (6)
I believe the answer is:
vaults
This might be a double definition.
'clears' is the first definition.
The definition and answer can be both to do with motion as well as being verbs in their -s form.
Perhaps you can see an association between them that I can't see?
'cellars' is the second definition.
(I've seen this before)
Can you help me to learn more?
(Other definitions for vaults that I've seen before include "Arched ceilings or underground chambers" , "Jumps, perhaps with aid of pole" , "Burial chambers or strongrooms" , "Jumps over burial chambers?" , "Cellars" .)