Of average quality (8)
'of average quality' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for mediocre that I've seen before include "Of middling quality" , "Rather poor" , "Nothing special" , "Fairly bad" , "Moderate to inferior in quality" .)
'of average quality' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for so-so that I've seen before include "Rather middling" , "OK, but nothing special" , "'Passable, middling (2-2)'" , "just about adequate" , "Neither good nor bad" .)