One who gives a party for a lot of people (4)
I believe the answer is:
host
This clue could be a double definition.
'one who gives a party' is the first definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'lot of people' is the second definition.
(I've seen this before)
'for a' is the link.
Can you help me to learn more?
(Other definitions for host that I've seen before include "Pub landlord" , "Multitude -- MC" , "One receiving guests" , "This man entertains" , "Army; publican" .)