Professional salespeople brought up to do well (7)
I believe the answer is:
prosper
'do well' is the definition.
(I've seen this before)
'professional salespeople brought up' is the wordplay.
'professional' becomes 'pro' (abbreviation).
'salespeople' becomes 'reps' (I've seen this in another clue).
'brought up' is a reversal indicator (in a down clue, letters go up).
'reps' in reverse letter order is 'sper'.
'pro'+'sper'='PROSPER'
'to' acts as a link.
(Other definitions for prosper that I've seen before include "Thrive, boom" , "Get rich" , "like Merimee, nominally" , "Go well" , "Make good" .)