Cryptic crossword clue
Van costing nothing – running green? 4-4

The most common and most likely answer to this crossword clue is the 9 letter word LEAD-FREE

I've seen this crossword clue in Financial Times
L
E
A
D
-
F
R
E
E

Buddy explains!

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 LEAD-FREE mean?

LEAD-FREE adjective
  1. Containing no lead.
  2. (of petroleum) Containing no tetraethyl lead; unleaded.

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