clef vs tenor clef

clef and tenor clef both are nouns.

Word	Noun	Adjective	Verb	Adverb
clef	Yes	No	No	No
tenor clef	Yes	No	No	No

As nouns, tenor clef is a hyponym of clef; that is, tenor clef is a word with a more specific, narrower meaning than clef:

clef: a musical notation written on a staff indicating the pitch of the notes following it
tenor clef: a clef that puts middle C on the fourth line of the staff; used for writing music for bassoons or cellos or tenor horns

clef (noun)	tenor clef (noun)
a musical notation written on a staff indicating the pitch of the notes following it	a clef that puts middle C on the fourth line of the staff; used for writing music for bassoons or cellos or tenor horns