English grammer term for....?

extra information?

e.g.

an old uncle - known as Blood 'n' Onus because he used the expression so often -

*and extract taken from a past paper

Thanks

[BobK]

Originally Posted by Unregistered

extra information?

e.g.

an old uncle - known as Blood 'n' Onus because he used the expression so often -

*and extract taken from a past paper

Thanks

"Parenthesis" or "parenthetical expression/clause". And it's grammar.

b