Show up always with a man (6)
I believe the answer is:
'show' is the definition.
('reveal' can be a synonym of 'show')
'up always with a man' is the wordplay.
'up' says the letters should be written in reverse (in down clue: letters go upwards).
'always' becomes 'ever' ('ever' can be a synonym of 'always').
'with' is a charade indicator (letters next to each other).
'a man' becomes 'al' (**).
'ever' in reverse letter order is 'reve'.
(Other definitions for reveal that I've seen before include "Uncover or expose", "Remove cover to display", "Give away", "Make known, uncover and allow to be seen", "window, in part".)