Missile guided back to English business (5)
I believe the answer is:
trade
'business' is the definition.
(trade is a kind of business)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for trade that I've seen before include "Deal commercially" , "Buy and sell in business" , "Deal - occupation" , "Customers" , "Dealing in goods" .)