The most common and most likely answer to this crossword clue is the 6 letter word GLIDER
I've seen this crossword clue in The Daily Telegraph
G
L
I
D
E
R
More clues leading to the result GLIDER
- Good songs lacking English craft without power
- Girl Ed harassed in aircraft without a sound?
- Country not needing many to commandeer top aircraft
- Flier using thermals gets good cover above East River
- The current situation must be all right for this flyer
- Original idea losing million before bringing in top aircraft
- Effective restraint in German plane
- Grand being on top, and on Queen’s aircraft
- Good ride up in the air — learner driver is in this?
- Coverage obtained in Germany for aircraft
Buddy explains!

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 GLIDER mean?
GLIDER noun- The act of gliding.
- A transitional sound, especially a semivowel.
- An attack or preparatory movement made by sliding down the opponent’s blade, keeping it in constant contact.
- A bird, the glede or kite.
- A kind of cap affixed to the base of the legs of furniture to prevent it from damaging the floor.
- The joining of two sounds without a break.
- A smooth and sliding step in dancing the waltz.
- One who glides.
- Any heavier-than-air aircraft optimised for unpowered flight; a sailplane.
- A pilot of glider aircraft.
- Any animal with the ability to glide, such as the gliding possum.
- A kind of garden swing.
- In the Game of Life cellular automaton, a particular configuration of five cells that recurs periodically at fixed offsets and appears to "walk" across the grid.
- A vehicle, of a usually motorised type, without a powertrain.