One who entertains a lot of people (4)
I believe the answer is:
host
This clue is a double definition.
'one who entertains' is the first definition.
(I've seen this before)
'a lot of people' is the second definition.
(I've seen this before)
(Other definitions for host that I've seen before include "Crowd-entertainer" , "One receiving guests" , "Pub landlord" , "Large crowd" , "One entertains guests" .)