The most common and most likely answer to this crossword clue is the 7 plus 3 letter word DRAWING PIN
I've seen this crossword clue in Independent
D
R
A
W
I
N
G
P
I
N
More clues leading to the result DRAWING PIN
- Pulling leg that one’s applied to the board
- Warn pidgin changes tack in the US
- Pulling leg, which holds up paper?
- Attract doctor with fashionable fastener
- One fixes pop-up sketch above
- Means to secure artistic work?
- Bandaging arm with first of plasters, bleed – there’s something sharp!
- Tack required when priming grenade …
- ’Ard up? Then it’s an arm and a leg for stationery equipment
- Pulling leg? One might be used to stick on board
Buddy explains!
The straight part
We know that "there’s something sharp" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case there’s something sharp = drawing pin.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.