The weariness of military duty (7)

I believe the answer is:

fatigue

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

This might be a double definition.

'the weariness' is the first definition.
('fatigue' can be a synonym of 'weariness')

'military duty' is the second definition.
'fatigue' can be an answer for 'duty' (fatigue duty is a kind of duty). I am unsure of the 'military' bit.

'of' acts as a link.

Can you help me to learn more?

(Other definitions for fatigue that I've seen before include "Tire" , "Tommy's punishment" , "Weariness from labour" , "Chronic symptom" , "weary" .)

I've seen this clue in The Globe and Mail.

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.