Some tables, seriously lower (6)

I believe the answer is:

lesser

'lower' is the definition.
(thesaurus)

'some tables seriously' is the wordplay.
'some' indicates the answer is hidden within the clue (some of the parts of the word are used).
'LESSER' is hidden in the letters of 'tables seriously'.

(Other definitions for lesser that I've seen before include "Smaller, minor" , "Not as great" , "Smaller in size or amount or value" , "Smaller; inferior" , "Not so important (one)" .)

I've seen this clue in The Telegraph.

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