The most common and most likely answer to this crossword clue is the 7 plus 6 letter word NORFOLK BROADS
I've seen this crossword clue in The Times
N
O
R
F
O
L
K
B
R
O
A
D
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.