Tense show (7)
I believe the answer is:
present
I believe this clue is a double definition.
'tense' is the first definition.
(I know that present is a type of tense)
'show' is the second definition.
(I know that show can be written as present)
(Other definitions for present that I've seen before include "In attendance with award?" , "Serpent (anag.)" , "host" , "Hand over < donation" , "Introduce < and compere < tense" .)