Average market (4)
I believe the answer is:
fair
I believe this is a double definition.
'average' is the first definition.
(I've seen this before)
'market' is the second definition.
(I've seen this before)
(Other definitions for fair that I've seen before include "'Just, meet (4)'" , "Equitable; expo" , "nothing special" , "Blonde or equitable" , "Unbiased; carnival" .)