Host (4)
'host' is the definition.
(both can mean a large number of people)
This is all the clue.
(Other definitions for army that I've seen before include "Military land force" , "Organisation for soldiering" , "Vast number" , "Collective term for caterpillars" , "See 6" .)
'host' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for slew that I've seen before include "Killed - swing" , "Killed in literary way" , "Cut down" , "Killed in archaic way" , "Suddenly turn" .)
'host' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for raft that I've seen before include "Flat structure for travel over water" , "... Lots" , "Flat floating device" , "Flat floating structure used as boat" , "Floating log structure; large amount" .)
'host' is the definition.
(I know that emcee is a more specific form of host)
This is the entire clue.
(Other definitions for emcee that I've seen before include "One presiding over an event" , "anchor" , "A host of Americans" , "I announce" , "Announcer" .)