The most common and most likely answer to this crossword clue is the 6 letter word SCATTY
I've seen this crossword clue in The Guardian
S
C
A
T
T
Y
More clues leading to the result SCATTY
- Moggie kept in pig pen is slightly crazy
- Empty-headed moggy in farmyard enclosure?
- Mean to follow partner who’s absent-minded
- Wild feline put in an enclosure
- Absent-minded lion perhaps in pigs’ enclosure
- Flighty animal in house of swine
- Small, spiteful, absent-minded and disorganised
- Dropping tally, not everyone's absent-minded
- Son, mean and empty-headed
Buddy explains!

The straight part
We know that "absent-minded" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case absent-minded = scatty.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 SCATTY mean?
SCATTY adjective- Scatterbrained; flighty.
- Showery; rainy