The most common and most likely answer to this crossword clue is the 6 letter word ROAMED
I've seen this crossword clue in The Daily Telegraph
R
O
A
M
E
D
Buddy explains!

The straight part
We know that "Wandered" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case wandered = roamed.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 ROAMED mean?
ROAMED verb- To wander or travel freely and with no specific destination.
- To use a network or service from different locations or devices.
- To transmit (resources) between different locations or devices, to allow comparable usage from any of them.
- To range or wander over.