List incorporated field of business (7)
I believe the answer is:
incline
'list' is the definition.
(list can mean to lean or roll)
'incorporated field of business' is the wordplay.
'incorporated' becomes 'inc'.
'field of business' becomes 'line' (I've seen this in another clue).
'inc'+'line'='INCLINE'
(Other definitions for incline that I've seen before include "tip" , "Have a tendency to do or be something" , "List" , "Turn" , "Be disposed to" .)