Right, step up and summarise! (5)
I believe the answer is:
recap
'summarise' is the definition.
(I've seen this before)
'right step up' is the wordplay.
'right' becomes 'r' (common abbreviation).
'step' becomes 'pace' ('pace' can be a synonym of 'step').
'up' says the letters should be written in reverse (in down clue: letters go upwards).
'pace' in reverse letter order is 'ecap'.
'r'+'ecap'='RECAP'
'and' is the link.
(Other definitions for recap that I've seen before include "Go over again with backward pacer" , "Go over again in the mind" , "In brief, go over the main points again" , "play again" , "Restate" .)