Shut yard properly one day! (8)

I believe the answer is:

thursday

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

'one day' is the definition.

'shut yard properly' is the wordplay.
'shut yard' can be anagrammed to 'THURSDAY'.
Though, I am not sure how the anagram is indicated.

Can you help me to learn more?

(Other definitions for thursday that I've seen before include "Fourth of five in the working week?" , "The Man Who Was -- (G.K. Chesterton)" , "72 hours or so ago" , "Thunder god's period" , "The Man Who Was -- (G. K. Chesterton)" .)

I've seen this clue in the Sydney Morning Herald.

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.