The most common and most likely answer to this crossword clue is the 3 letter word ORB
I've seen this crossword clue in The Guardian
O
R
B
More clues leading to the result ORB
Buddy explains!

The straight part
We know that "globe" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case globe = orb.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 ORB mean?
ORB noun- A spherical body; a globe; especially, one of the celestial spheres; a sun, planet, or star
- One of the azure transparent spheres conceived by the ancients to be enclosed one within another, and to carry the heavenly bodies in their revolutions
- A circle; especially, a circle, or nearly circular orbit, described by the revolution of a heavenly body; an orbit
- A period of time marked off by the revolution of a heavenly body.
- The eye, as luminous and spherical
- A revolving circular body; a wheel
- A sphere of action.
- A globus cruciger; a ceremonial sphere used to represent royal power
- A translucent sphere appearing in flash photography (Orb (optics))
- A body of soldiers drawn up in a circle, as for defence, especially infantry to repel cavalry.
- To form into an orb or circle.
- To become round like an orb.
- To encircle; to surround; to enclose.
- A blank window or panel.