Mediocre serving of miso soup (2-2)
I believe the answer is:
so-so
'mediocre' is the definition.
(thesaurus)
'of miso soup' is the wordplay.
'of' says the answer is hidden in the clue.
'SO-SO' can be found hidden inside 'miso soup'.
'serving' is the link.
(Other definitions for so-so that I've seen before include "Mediocre" , "OK, but nothing special" , "Only moderately good in repetitive way" , "Fair to middling" , "Indifferently good" .)