Crossword Genius

I’m told one might long for a port (4)

Ross

I believe the answer is:

acre

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

'for a port' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

Can you help me to learn more?

(Other definitions for acre that I've seen before include "Crusaders battlefield, now in Israel" , "marine location in Israel" , "4840 sq yds" , "region of ground" , "Unit of land area" .)

I've seen this clue in The Sunday Times.
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.