Present some uplifting characters from theatre rehearsals (4)
I believe the answer is:
here
'present' is the definition.
('here' can be similar in meaning to 'present')
'some uplifting characters from theatre rehearsals' is the wordplay.
'some uplifting' shows that the letters should be reversed in order.
'characters from' indicates the answer is hidden within the clue.
'ereh' is hidden within 'theatre rehearsals'.
'ereh' written backwards gives 'HERE'.
(Other definitions for here that I've seen before include "Hither" , "On this spot" , "In this place - present" , "final clue?" , "At this stage" .)