The most common and most likely answer to this crossword clue is the 7 letter word CORKING
I've seen this crossword clue in The Daily Telegraph
C
O
R
K
I
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G
More clues leading to the result CORKING
Buddy explains!
The straight part
We know that "crack" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case crack = corking.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 CORKING mean?
CORKING verb- To seal or stop up, especially with a cork stopper.
- To blacken (as) with a burnt cork
- To leave the cork in a bottle after attempting to uncork it.
- To fill with cork, as the center of a baseball bat.
- To injure through a blow; to induce a haematoma.
- To position one's drift net just outside of another person's net, thereby intercepting and catching all the fish that would have gone into that person's net.
- To perform such a maneuver.
- The formation of white, cork-like striations on a jalapeño pepper.
- Splendid, enjoyable, bang-up