Not retail (9)
I believe the answer is:
wholesale
'not retail' is the definition.
('wholesale' is the opposite to 'retail')
This is the entire clue.
(Other definitions for wholesale that I've seen before include "Trade that sells goods to retailers" , "In an indiscriminate way" , "Business of supplying retailers" , "Extensive and indiscriminate" , "In large quantities - indiscriminately" .)