The most common and most likely answer to this crossword clue is the 10 letter word SHARPENERS
I've seen this crossword clue in The Daily Telegraph
S
H
A
R
P
E
N
E
R
S
Buddy explains!
The straight part
We know that "They’ll give an edge" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case they’ll give an edge = sharpeners.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 SHARPENERS mean?
SHARPENERS noun- A device for making things sharp.
- That which makes something sharp.
- An alcoholic drink taken at the start of the day, or just before a meal.