Chasms or bottomless pits (7)

I believe the answer is:

abysses

I believe this is a double definition.

'chasms' is the first definition.
(abyss is a kind of chasm)

'bottomless pits' is the second definition.
(I've seen this before)

(Other definitions for abysses that I've seen before include "deep chasms" , "Seemingly bottomless pits" .)

I've seen this clue in The Irish Times.

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