Deal (5)
'deal' is the definition.
(I know that deal can be written as trade)
This is all the clue.
(Other definitions for trade that I've seen before include "Dealing in goods" , "A skilled craft to earn living" , "Deal commercially" , "groundsman?" , "Buying/selling of goods" .)
'deal' is the definition.
(to traffic something is to sell or deal in it)
This is all the clue.
(Other definitions for traffic that I've seen before include "Lots of vehicles" , "Business" , "Smuggle" , "dealings" , "Group" .)
'deal' is the definition.
(I know that deal can be written as bargain)
This is the entire clue.
(Other definitions for bargain that I've seen before include "understanding" , "Haggle; a good deal" , "An agreement, or thing got cheaply" , "Negotiate terms" , "value for money" .)