The most common and most likely answer to this crossword clue is the 7 letter word SHAVING
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Buddy explains!
The straight part
We know that "What plane takes off" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case what plane takes off = shaving.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 SHAVING mean?
SHAVING verb- To make bald or shorter by using a tool such as a razor or pair of electric clippers to cut the hair close to the skin.
- To cut anything in this fashion.
- To remove hair from one's face by this means.
- To cut finely, as with slices of meat.
- To skim along or near the surface of; to pass close to, or touch lightly, in passing.
- To reduce in size or weight.
- To be hard and severe in a bargain with; to practice extortion on; to cheat.
- To buy (a note) at a discount greater than the legal rate of interest, or to deduct in discounting it more than the legal rate allows.
- A thin, shaved off slice of wood, metal, or other material.
- The action of having a shave.