Overpriced (5)
I believe the answer is:
steep
'overpriced' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for steep that I've seen before include "Vertiginous; excessive" , "Rapidly rising" , "Without the bounds of moderation" , "Quickly rising" , "Precipitous - outrageous" .)