Show right way to trade (6)
I believe the answer is:
export
'way to trade' is the definition.
(as in exporting goods)
'show right' is the wordplay.
'show' becomes 'expo' (short for exposition, a large exhibition).
'right' becomes 'rt' (abbreviation as in Rt Hon- the Right Honourable).
'expo'+'rt'='EXPORT'
(Other definitions for export that I've seen before include "Send goods for sale abroad" , "Carry out of country" , "ship overseas" , "Dispose of to another country" , "Send to another country" .)