Claims containers, a lot (4)
I believe the answer is:
bags
I believe this is a triple definition!
'claims' is the first definition.
(I've seen this before)
'containers' is the second definition.
(bag is a kind of container)
'a lot' is the third definition.
(bags can mean a large amount)
(Other definitions for bags that I've seen before include "Takes unilaterally" , "Items of luggage" , "Containers for carrying, informally plenty" , "Items of clothing" , "Trousers (inf.); receptacles for carrying" .)