Cryptic crossword clue
   Contracts essentially null and void for motorway, perhaps 4

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

I've seen this crossword clue in Independent
R
O
A
D


Buddy explains!

The straight part
We know that "motorway, perhaps" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case motorway, perhaps = road.
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 ROAD mean?

ROAD noun
  1. A way used for travelling between places, originally one wide enough to allow foot passengers and horses to travel, now (US) usually one surfaced with asphalt or concrete and designed to accommodate many vehicles travelling in both directions. In the UK both senses are heard: a country road is the same as a country lane.
  2. A road; or particularly a car, as a means of transportation.
  3. A path chosen in life or career.
  4. An underground tunnel in a mine.
  5. A railway or a single railway track.
  6. The act of riding on horseback.
  7. A hostile ride against a particular area; a raid.
  8. (often in the plural) A partly sheltered area of water near a shore in which vessels may ride at anchor; a roadstead.
  9. A journey, or stage of a journey.
  10. A way or route.
ROAD adjective
  1. At the venue of the opposing team or competitor; on the road.
  2. (Slang) Having attributes, primarily masculine, suggesting a tendency towards minor crime. Usually used by youths endearingly; glorifying crime.

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