Go forward or go right back in a crowd (8)
I believe the answer is:
progress
'go forward' is the definition.
(I've seen this before)
'go right back in a crowd' is the wordplay.
'right' becomes 'r' (common abbreviation).
'back' says the letters should be written backwards.
'in' indicates putting letters inside.
'a crowd' becomes 'press' (to press can mean to crowd around).
'go'+'r'='gor'
'gor' backwards is 'rog'.
'rog' placed within 'press' is 'PROGRESS'.
'or' is the link.
(Other definitions for progress that I've seen before include "Course" , "Headway" , "Mature" , "Move forward" , "Breakthrough - advance" .)