The most common and most likely answer to this crossword clue is the 10 letter word GUIDEBOOKS
I've seen this crossword clue in The Guardian
G
U
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D
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B
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K
S
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 GUIDEBOOKS mean?
GUIDEBOOKS noun- A book that provides guidance, but especially one designed for travellers which provides local tourist information about a particular country or area.