It's narrow and may have pins at the end (5)

I believe the answer is:

alley

I'm a little stuck... Click here to teach me more about this clue!

'end' is the definition.
The definition and answer can be both man-made objects as well as being singular nouns.
Perhaps you can see an association between them that I don't see?

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for alley that I've seen before include "space in US court" , "Narrow passage" , "Walk" , "Marble" , "Narrow back street" .)

I've seen this clue in the Evening Standard.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.