Average broadcasts for audience (2-2)
I believe the answer is:
so-so
'average' is the definition.
(I've seen this before)
I cannot understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for so-so that I've seen before include "just about adequate" , "Rather middling" , "Tolerable, indifferent" , "Barely passable" , "Fair to middling" .)