The most common and most likely answer to this crossword clue is the 7 letter word KEYHOLE
I've seen this crossword clue in The Guardian
K
E
Y
H
O
L
E
More clues leading to the result KEYHOLE
- Main unit for broadcasters opening in Yale?
- Very important and difficult situation in this surgery?
- Opening clue perfect for discussion
- Solution put on orifice for a sort of surgery
- Gap to help us enter part of harbour undamaged, we’re informed
- Opening crucial stage of Open?
- Yale’s entrance requirement
- Important part of course giving entry to Yale?
- Island house the French will make a tempting prospect for some?
- Report complete support for crucial type of surgery
Buddy explains!

The straight part
We know that "Yale’s entrance requirement" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case yale’s entrance requirement = keyhole.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 KEYHOLE mean?
KEYHOLE noun- The hole in a lock where the key is inserted and turns.
- Any small opening resembling the hole for a key in shape or function.
- A circle cut out of a garment as a decorative effect, typically at the front or back neckline of a dress.
- A hole or excavation in beams intended to be joined together, to receive the key that fastens them.
- A mortise for a key or cotter.
- (lasers) A transient column of vapor or plasma formed when using high energy beams, such as lasers, for welding or cutting.
- A welding method in which a hole forms in the surface immediately ahead of the puddle in the direction of welding. The hole is filled as the weld progresses.
- The free-throw lane together with the circle surrounding the free-throw line; key.
- A gravitational keyhole.
- (ordnance) To strike a target after wobbling in flight so that the long axis of the bullet does not follow the line of flight; typically due to insufficient spin resulting from the rifling in the barrel.