The most common and most likely answer to this crossword clue is the 4 letter word LINK
L
I
N
K
More clues leading to the result LINK
- Connection used by school in Karachi
- Kiln’s broken connection
- Associate with large tattoo
- Some part of mail attachment
- Light joinery?
- Establish connection school in Karachi uses
- Online reference for short golf course
- “Blink first Boris” rejected relationship
- Left Mark for hook up
- Prison removing first component of chains
Buddy explains!

The straight part
We know that "connection" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case connection = link.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 LINK mean?
LINK noun- Some text or a graphic in an electronic document that can be activated to display another document or trigger an action.
- (by extension) An address, URL, or program that defines a hyperlink's function.
- A connection between places, people, events, things, or ideas.
- One element of a chain or other connected series.
- The connection between buses or systems.
- A space comprising one or more disjoint knots.
- A thin wild bank of land splitting two cultivated patches and often linking two hills.
- An individual person or element in a system
- Anything doubled and closed like a link of a chain.
- A sausage that is not a patty.
- (kinematics) Any one of the several elementary pieces of a mechanism, such as the fixed frame, or a rod, wheel, mass of confined liquid, etc., by which relative motion of other parts is produced and constrained.
- Any intermediate rod or piece for transmitting force or motion, especially a short connecting rod with a bearing at each end; specifically (in steam engines) the slotted bar, or connecting piece, to the opposite ends of which the eccentric rods are jointed, and by means of which the movement of the valve is varied, in a link motion.
- The length of one joint of Gunter's chain, being the hundredth part of it, or 7.92 inches, the chain being 66 feet in length.
- A bond of affinity, or a unit of valence between atoms; applied to a unit of chemical force or attraction.
- (plural) The windings of a river; the land along a winding stream.
- To connect two or more things.
- (of a Web page) To contain a hyperlink to another page.
- To supply (somebody) with a hyperlink; to direct by means of a link.
- To post a hyperlink to.
- To demonstrate a correlation between two things.
- To combine objects generated by a compiler into a single executable.
- A torch, used to light dark streets.
- To skip or trip along smartly; to go quickly.