Step right up for review (5)
I believe the answer is:
recap
'review' is the definition.
('recap' can be a synonym of 'review')
'step right up' is the wordplay.
'step' becomes 'pace' ('pace' can be a synonym of 'step').
'right' becomes 'r' (common abbreviation).
'up' is a reversal indicator (in down clue: letters go upwards).
'pace'+'r'='pacer'
'pacer' in reverse letter order is 'RECAP'.
'for' is the link.
(Other definitions for recap that I've seen before include "Go back over the main points" , "Reiterate" , "cover the same ground again" , "Run over the points again" , "Go over the main points again, in short" .)