The most common and most likely answer to this crossword clue is the 9 letter word SLAPHAPPY
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A
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More clues leading to the result SLAPHAPPY
Buddy explains!
The straight part
We know that "reckless" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case reckless = slaphappy.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 SLAPHAPPY mean?
SLAPHAPPY adjective- Incoherent from being struck; punch drunk.
- In a humorous mood as a result of fatigue; silly from being tired.
- Irresponsibly free.