Performing (5)
'performing' is the definition.
('do' can be a synonym of 'perform')
This is the entire clue.
(Other definitions for doing that I've seen before include "thrashing" , "Engaged in -- active" , "Effecting" , "visiting as a tourist" , "Hoaxing" .)
'performing' is the definition.
(acting is a kind of performing)
This is all the clue.
(Other definitions for acting that I've seen before include "Playing a part" , "Behaving like thespian" , "Taking on duties temporarily" , "Behaving like a player" , "stagecraft" .)
'performing' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for onstage that I've seen before include "(Of actor) visible to the audience" , "in full view of the audience" , "In view of house" , "as a player may be?" , "Visible to (theatre) audience" .)
'performing' is the definition.
('execute' can be a synonym of 'perform')
This is all the clue.
(Other definitions for arts that I've seen before include "Wiles, skills" , "Literature, music etc." , "Humanities" , "Aesthetic products for star" , "Non-science subjects" .)