Lots of trousers (4)
I believe the answer is:
bags
I believe this is a double definition.
'lots of' is the first definition.
(I've seen this before)
'trousers' is the second definition.
(informal term for trousers, Oxford bags)
(Other definitions for bags that I've seen before include "Childishly claims" , "Successfully secures" , "Lots of" , "Gets" , "things" .)