Clef is a 4 letter English word. It's valid Scrabble word worth 9 points. It's valid Words with friends word worth 11 points.
You can make 27 anagrams from letters in CLEF (cefl).
1570-80; Middle French Latin clāvis key
Le Tarot Divinatoire: clef du tirage des cartes et des sorts.
clef, klef, n. a musical character placed on the staff by which the absolute pitch of the notes is fixed.
The clef is here changed to its lowest, and the little book is a lot of tremolos about old age, death, and faith.
She was so tall the girls always considered her in that clef.
They could only be written (as they are yet) in one clef—namely, the F clef.
In olden days any clef line might be taken with any number of lines above and below.
After a change of clef in the middle of a score this is, of course, not necessary.
He also observes that this oratorio is the first work in which the proper sharps and flats are generally placed at the clef.
It will be noted that in each case the line on which the clef is placed represents "middle C."
This was what has since become the fourth line, the clef line, of the bass stave.