The most common and most likely answer to this crossword clue is the 9 letter word SPHERICAL
I've seen this crossword clue in The Guardian
S
P
H
E
R
I
C
A
L
More clues leading to the result SPHERICAL
- All round sides of ship, unthinkable to chuck alien out
- Republican kept in his place, thrashing round
- Round his place oddly beginning to rage inside
- Organisation of parish clerks, last three dropping round
- round
- Round leader in parliament, Charles I scattered guards
- Drunk riles chap getting round
- As balls reach slip, spinning
- Start to hold calipers turned round and round?
- Make his parcel round
Buddy explains!

The straight part
We know that "round" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case round = spherical.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 SPHERICAL mean?
SPHERICAL adjective- Shaped like a sphere.
- Of, or pertaining to, spheres.
- Of a coordinate system, specifying the location of a point in a plane by using a radius and two angles.
- Of or relating to the heavenly orbs, or to the sphere or spheres in which, according to ancient astronomy and astrology, they were set.