The most common and most likely answer to this crossword clue is the 4 plus 5 letter word SLAM DUNKS
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More clues leading to the result SLAM DUNKS
Buddy explains!

The straight part
We know that "dramatic wins" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case dramatic wins = slam dunks.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 SLAM DUNKS mean?
SLAM DUNKS noun- An impressively forceful dunk.
- A task expected to present no difficulty, a piece of cake.
- (yachting) Tacking on top of the wind of the following yacht in close quarters