Hotshots (4)
'hotshots' is the definition.
('ace' can be a synonym of 'hotshot')
This is all the clue.
(Other definitions for aces that I've seen before include "Top (or bottom) cards" , "Ones or elevens in cards" , "never come back" , "winning shots" , "wartime pilots?" .)
(Other definitions for vips that I've seen before include "Celebrities" , "Bigwigs" .)