The most common and most likely answer to this crossword clue is the 7 letter word MIGRANT
I've seen this crossword clue in The Sunday Telegraph
M
I
G
R
A
N
T
More clues leading to the result MIGRANT
- Traveller given licence to go on major road
- Travelling with unfortunately grim worker
- Traveller to admit following motorway
- Wandering Russian fighter encounters storm
- & 15ac. Labour executors after Ming art Reproduction – the bugbear of Brexiteers?
- Traveller‘s plane took off ahead of time
- Traveller in Russian plane to hold forth
- Male, I admit, who travels to work
- Mile award for cross-country type?
- Single allowance given to married traveller
Buddy explains!

The straight part
We know that "who travels to work" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case who travels to work = migrant.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 MIGRANT mean?
MIGRANT noun- A migratory bird or other animal.
- Traveller or worker who moves from one region or country to another.
- An immigrant or refugee.
- Any of various pierid butterflies of the genus Catopsilia. Also called an emigrant.
- Migratory.