Actors hide article - a game (7)
I believe the answer is:
canasta
'game' is the definition.
(I know that Canasta is a type of game)
'actors hide article a' is the wordplay.
'actors' becomes 'cast' (group of actors).
'hide' indicates putting letters inside.
'article' becomes 'an' (indefinite article).
'cast' enclosing 'an' is 'canast'.
'canast'+'a'='CANASTA'
(Other definitions for canasta that I've seen before include "Decorated with artificial jewels" , "Two-pack card game" , "Card game -- as an act (anag)" , "Card game like rummy" , "Form of rummy using two decks of cards and four jokers" .)