Vendors of storage facilities that can be picked up (7)
I believe the answer is:
sellers
'vendors' is the definition.
('seller' can be a synonym of 'vendor')
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for sellers that I've seen before include "Vendors" , "British actor, star of the 17" , "Peter" , "kind of market" .)