Labyrinth of burrows (6)

I believe the answer is:

warren

'labyrinth of burrows' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for warren that I've seen before include "Colony of rabbits" , "Home to rabbits" , "Network of caves as built by rabbits" , "Series of rabbit burrows" , "Rabbit's burrow" .)

I've seen this clue in The Irish Times and the Irish Times (Simplex).

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