The most common and most likely answer to this crossword clue is the 11 letter word SLOW-WITTED
I've seen this crossword clue in Independent
S
L
O
W
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D
Buddy explains!
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 SLOW-WITTED mean?
SLOW-WITTED adjective- Lacking a keen or swift intellect, not too bright or not too swift.