Cryptic crossword clue
Perhaps Mars bar wrapper shows the way 4

The most common and most likely answer to this crossword clue is the 4 letter word LANE

I've seen this crossword clue in Financial Times
L
A
N
E


Buddy explains!

The straight part
We know that "way" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case way = lane.
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 LANE mean?

LANE noun
  1. (used in street names) A road, street, or similar thoroughfare.
  2. A narrow passageway between fences, walls, hedges or trees.
  3. A narrow road, as in the country.
  4. A lengthwise division of roadway intended for a single line of vehicles.
  5. A similar division of a racetrack to keep runners apart.
  6. A course designated for ships or aircrafts.
  7. An elongated wooden strip of floor along which a bowling ball is rolled.
  8. An empty space in the tableau, formed by the removal of an entire row of cards.
  9. Any of the parallel slots in which values can be stored in a SIMD architecture.
  10. In MOBA (multiplayer online battle arena) games, a particular path on the map that may be traversed by enemy characters.
  11. The homestretch.

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