The most common and most likely answer to this crossword clue is the 13 letter word ALL-EMBRACING
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More clues leading to the result ALL-EMBRACING
Buddy explains!
The straight part
We know that "Comprehensive" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case comprehensive = all-embracing.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 ALL-EMBRACING mean?
ALL-EMBRACING adjective- Having a broad scope; of universal application.