Clef and Treble staff

Clef noun - A musical notation written on a staff indicating the pitch of the notes following it.

Treble staff and clef are semantically related. In some cases you can replace phrase "Treble staff" with "Clef", this terms are similar.

Treble staff noun - A clef that puts the G above middle C on the second line of a staff.

Clef and treble staff are semantically related. You can use "Clef" instead a noun phrase "Treble staff".