The most common and most likely answer to this crossword clue is the 7 letter word ORBITAL
O
R
B
I
T
A
L
More clues leading to the result ORBITAL
- Sort of road test after component has been installed
- Cut in dental examination going round
- Test covers part of town bypass perhaps
- Like the M25? Part gets spoken about
- Like a revolution in space travel
- Spoken about role of path in space
- Speaking about section of M25, say
- Ringroad has part that’s got spoken about
- The M25, for example — what may be said about small section?
- Like the M25, said to have got built in at intervals
Buddy explains!

The straight part
We know that "M25?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case m25? = orbital.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 ORBITAL mean?
ORBITAL noun- A specification of the energy and probability density of an electron at any point in an atom or molecule.
- An orbital motorway.
- Of or relating to an orbit.
- Of or relating to the eye socket (eyehole).
- (roads, railways) passing around the outside of a certain area.