The most common and most likely answer to this crossword clue is the 7 letter word BEZIQUE
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Buddy explains!

The straight part
We know that "deck entertainment?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case deck entertainment? = bezique.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does BEZIQUE mean?
BEZIQUE noun- A trick-taking card game for two players.
- The act of taking certain cards in this game: the queen of spades and jack of diamonds, or (if either of those suits is trumps) the queen of clubs and jack of hearts.