Crossword Genius

Plague hunter possibly gets two-hour shift (3,5)

Ross

I believe the answer is:

dog watch

'two-hour shift' is the definition.
(naval term for a shift keeping watch)

'plague hunter possibly' is the wordplay.
'plague' becomes 'dog' (both can mean to follow or repeatedly torment).
'hunter possibly' becomes 'watch' (hunter is a kind of watch).
'dog'+'watch'='DOG-WATCH'

'gets' is the link.

(Other definitions for dog watch that I've seen before include "Crufts?" , "The afternoon shift" , "two-hour shift" .)

I've seen this clue in The Guardian.
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