Covers possibly slid into position (4)

I believe the answer is:

lids

I'm a little stuck... Click here to teach me more about this clue!

'covers' is the definition.
(lid is a kind of cover)

'slid into position' is the wordplay.
'slid' anagrams to 'LIDS'.
Though, I'm unsure how this is indicated.

'possibly' acts as a link.

Can you help me to learn more?

(Other definitions for lids that I've seen before include "Movable tops or covers" , "Covers for opening and closing" , "Eye covers" .)

I've seen this clue in the Evening Standard.

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