Covers nothing inside the bathing-pools (5)

I believe the answer is:

lidos

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'bathing-pools' is the definition.
I can't judge whether this definition defines the answer.

'covers nothing inside' is the wordplay.
'covers' becomes 'lids' (lid is a kind of cover).
'nothing' becomes 'o' (O resembles 0).
'inside' is an insertion indicator.
'lids' placed around 'o' is 'LIDOS'.

'the' is the link.

Can you help me to learn more?

(Other definitions for lidos that I've seen before include "bathing beaches" , "swimmers like them" , "Open-air swimming pools" , "which swimmers may use" , "Open air swimming pools" .)

I've seen this clue in The Irish Independent.

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