Where to dig out one’s prey? (6)
I believe the answer is:
quarry
I believe this clue is a double definition.
'where to dig out' is the first definition.
(place to dig out rock)
'one's prey?' is the second definition.
(quarry can mean an animal's prey)
(Other definitions for quarry that I've seen before include "Prey; excavation site" , "Dig out" , "Hunted animal; stone pit" , "Extract, for example, stone" , "what one seeks ..." .)