Steal the show from further back (7)
I believe the answer is:
upstage
'steal the show from' is the definition.
(I've seen this in another clue)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for upstage that I've seen before include "dwarf?" , "Pugs eat (anag.)" , "Take the limelight from" , "(Of actor) away from the audience" , "Furthest from the audience (in theatre)" .)