Wrangle over price (6)
I believe the answer is:
haggle
'wrangle over price' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for haggle that I've seen before include "Barter" , "Dispute about price" , "way, to get a good price" , "Argue about price, dicker" , "Bargain over prices" .)