Shares buildings with squirrels (10)
I believe the answer is:
stockpiles
'squirrels' is the definition.
Although both the answer and definition are plural nouns, I cannot see how they can define each other.
'shares buildings' is the wordplay.
'shares' becomes 'stock'.
'buildings' becomes 'piles' (I am not sure about this - if you are sure you should believe this answer much more).
'stock'+'piles'='STOCKPILES'
'with' is the link.
Can you help me to learn more?
(Other definitions for stockpiles that I've seen before include "Hoards" , "Gathers commodities" .)