When I was an elementary school student in Montréal, we were taught that some words or phrases did not need to be spoken or written because they were 'understood'.
Another OP on site asked a question that included this as an example:
Who is your favourite footballer and cricketer?
I would like to say, Who is your favourite footballer and who is your favourite cricketer?" The part in bold type is understood.
However, I cannot find a definition for what I call understood. Is there another name for this in grammar?