Add-__: extras (3)
I believe the answer is:
ons
(Another definition for ons that I've seen is " Stages".)
I've seen this clue in the LA Times and the King Feature Syndicate.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.