Line of work
'line of work' is the definition.
(trade is a kind of line of work)
This is all the clue.
(Other definitions for trade that I've seen before include "Transaction" , "some say should be fair?" , "Business - (kind of) wind" , "Rated (anag.)" , "groundsman?" .)
'line of work' is the definition.
(career is a kind of line of work)
This is the entire clue.
(Other definitions for career that I've seen before include "Progresson through working life" , "go very fast" , "Tear" , "Working lifetime" , "Run; calling" .)