Dash back with English deal (5)
I believe the answer is:
trade
'deal' is the definition.
(I know that deal is a more specific form of the action deal)
'dash back with english' is the wordplay.
'dash' becomes 'd'art' (synonyms).
'back' says the letters should be written backwards.
'with english' becomes 'e' (abbreviation. I am not sure about the 'with' bit.).
'dart' back-to-front is 'trad'.
'trad'+'e'='TRADE'
Can you help me to learn more?
(Other definitions for trade that I've seen before include "Commercial exchange of goods and services" , "Business - deal" , "Barter, do business" , "Deal - occupation" , "Dealing in goods" .)