Cryptic crossword clue
Result of a failure to score: cocaine added to a kilo, roughly kg

The most common and most likely answer to this crossword clue is the 4 plus 4 letter word GOAL KICK

I've seen this crossword clue in The Guardian
G
O
A
L
K
I
C
K

Buddy explains!

The straight part
We know that "Result of a failure to score" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case result of a failure to score = goal kick.
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.

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