Reduce in price (8)
I believe the answer is:
discount
'reduce in price' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for discount that I've seen before include "Ignore - trade concession" , "Ignore - price reduction" , "Reject as unimportant" , "Tend not to believe" , "Disregard; cost cut" .)