The most common and most likely answer to this crossword clue is the 7 letter word SPANKER
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Buddy explains!
The straight part
We know that "One’s striking bottom?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case one’s striking bottom? = spanker.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 SPANKER mean?
SPANKER noun- Someone who spanks.
- An instrument used to give someone a spanking or spank, such as a paddle.
- A fore-and-aft gaff-rigged sail on the aft-most mast of a square-rigged vessel.
- A musician who plays his instrument well.
- A small coin.
- One who takes long, quick strides in walking.
- A swift horse.
- Something very large, or larger than usual; a whopper.
- Something splendid; a fine example of its kind.