The most common and most likely answer to this crossword clue is the 10 letter word TARMACADAM
I've seen this crossword clue in The Guardian
T
A
R
M
A
C
A
D
A
M
More clues leading to the result TARMACADAM
Buddy explains!
The straight part
We know that "It’s on the way?" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case it’s on the way? = tarmacadam.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 TARMACADAM mean?
TARMACADAM noun- A mixture of tar and small stones used in paving.
- To cover or surface with tarmacadam.