The most common and most likely answer to this crossword clue is the 6 letter word ENERGY
I've seen this crossword clue in The Daily Telegraph
E
N
E
R
G
Y
More clues leading to the result ENERGY
- Go when green has changed? Start off yes
- Greener gym conserves power
- Development of green factory’s latest power supply
- Go apoplectic green? Yes!
- What’s displayed by keener gymnasts, in part?
- Go for revitalised green youth leader
- Go halves in teen beer orgy
- Animation features design of green and yellow, initially
- Dynamism of topless 21 orgy
- Go green after trouble at start of year
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 ENERGY mean?
ENERGY noun- The impetus behind all motion and all activity.
- The capacity to do work.
- A quantity that denotes the ability to do work and is measured in a unit dimensioned in mass × distance²/time² (ML²/T²) or the equivalent.
- An intangible, modifiable force (often characterized as either 'positive' or 'negative') believed in some New Age religions to emanate from a person, place or thing and which is (or can be) preserved and transferred in human interactions; shared mood or group habit; a vibe, a feeling, an impression. (Compare aura.)
- (often plural) The external actions and influences resulting from an entity’s internal nature (ousia) and by which it is made manifest, as opposed to that internal nature itself; the aspect of an entity that can affect the wider world and be apprehended by other beings.
- A measure of how many actions a player or unit can take; in the fantasy genre often called magic points or mana.