It's a question of showmanship (3)
I believe the answer is:
how
'it's a question' is the definition.
(I've seen this in other clues)
'of showmanship' is the wordplay.
'of' indicates a hidden word.
'HOW' is hidden in the letters of 'showmanship'.
(Other definitions for how that I've seen before include "See 16" , "In what manner or method?" , "Who (anag.)" , "By what means?" , "In what way?" .)