Fried fish coating (6)
(Other definitions for batter that I've seen before include "What the chippy offers" , "Mixture of flour, eggs and milk, used in cooking" , "Hit hard and often, like cooking mixture" , "Hit hard and often (6)" , "Treat violently - pancake mix" .)
(Other definitions for barter that I've seen before include "Trade by exchanging commodities" , "Trade or swap" , "Exchange, bargain" , "Trade, haggle" , "Trade by direct exchange of goods" .)
(Other definitions for tartar that I've seen before include "Unpleasant sort" , "Fearsome person: kind of sauce" , "ancient Mongolian" , "She terrifies" , "A ferocious person" .)
(Other definitions for scales that I've seen before include "Sets of musical notes - balanced on a fish?" , "Weighing machine" , "Fish flakes or measuring devices" , "though it's not Pisces" , "Weighing devices or fish flakes" .)
(Other definitions for chippy that I've seen before include "Carpenter, informally" , "fish restaurant?" , "Irritable fellow" , "Shop selling fried potatoes - carpenter" , "battering outlet" .)
(Another definition for goujon that I've seen is " Fried strip of or fish".)