One drill my caddie and coach has showed me in the past is to take the club back to 9:00, having NOT cocked your wrist thus far, then turn through the ball without feeling any release of your wrists. You’re going to feel like you’re hitting the ball with your body. This is a very good feeling, one that will quickly improve your golf swing consistency, and make your swing more compact. This practice swing uses your “core" to power swing, and not solely flicking your wrist at impact golf swing. If you can get to the point of compressing your ball without feeling like you’re releasing your wrist cock, you’re well on your way to getting rid of that "flicking" motion in the impact zone. This is just a little drill to do for like 2 minutes or something on the range or before you tee off. Of course, once you move to a full swing to play a round, you need to release the clubhead. But that drill will train your muscles to hold the lag for that extra split second. Takes some practice, but just stick with it. Hope that answers your question.
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God Bless