Cryptic crossword clue
Nearly learned to inject cocaine and heroin 4

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

I've seen this crossword clue in Independent
S
C
A
G

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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 SCAG mean?

SCAG noun
  1. Heroin.
  2. (originally African American Vernacular English) A woman of loose morals.
  3. A cigarette.
SCAG verb
  1. To destroy the data on a disk, either by corrupting the filesystem or by causing media damage.

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