A great many (4)
(Other definitions for lots that I've seen before include "Oodles" , "may be drawn" , "A great deal" , "Items offered at auction" , "Great quantities" .)
'a great many' is the definition.
(as in 'a host of golden daffodils')
This is all the clue.
(Other definitions for host that I've seen before include "A load" , "Compre" , "This man entertains" , "Army - innkeeper" , "Pub landlord" .)