The most common and most likely answer to this crossword clue is the 8 letter word FRONTIER
I've seen this crossword clue in The Daily Telegraph
F
R
O
N
T
I
E
R
More clues leading to the result FRONTIER
- Confines father over row
- £5 I've spent on line? That's the limit (8
- Ron and I fret about marches
- Border terrier’s clothing: fine or foul?
- Fellow run out by new opener has row on boundary
- Border of France about level
- Verge on row with father being superior
- Row initiated by father on edge
- Chutzpah mainly precedes row in border
- Weather feature that is on river edge
Buddy explains!

The straight part
We know that "edge" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case edge = frontier.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 FRONTIER mean?
FRONTIER noun- The part of a country which borders or faces another country or unsettled region
- The most advanced or recent version of something; leading edge.
- An outwork of a fortification.
- To live as pioneers on frontier territory.
- To place on the frontier.