Force multinational group to provide entertainment (3)
I believe the answer is:
fun
'entertainment' is the definition.
(I've seen this before)
'force multinational group' is the wordplay.
'force' becomes 'f' (symbol used in Physics e.g. f=ma**).
'multinational group' becomes 'un' (United Nations).
'f'+'un'='FUN'
'to provide' acts as a link.
(Other definitions for fun that I've seen before include "Playful amusement" , "Jollification" , "Entertaining" , "entertainment" , "Enjoyment" .)