The most common and most likely answer to this crossword clue is the 8 letter word TOP-DOWN
I've seen this crossword clue in The Guardian
T
O
P
-
D
O
W
N
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 TOP-DOWN mean?
TOP-DOWN adjective- Of or relating to a hierarchical system that progresses from a single, large basic unit to multiple, smaller subunits.
- Produced, controlled, or directed by those at the top of the hierarchy.
- Having an aerial view