Crossword Genius

It's in addition to that leader getting to present with couple on the radio (7)

Ross

I believe the answer is:

thereto

I'm a little stuck... Click here to teach me more about this clue!

But I can't explain it at all! Could you help me understand?

(Other definitions for thereto that I've seen before include "To that place" , "In addition" , "Up to that point" .)

I've seen this clue in The Irish Times.
Want a hint initially instead of a full solution? Install my app