Inverted caret (3)
I believe the answer is:
vee
'inverted caret' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for vee that I've seen before include "22nd letter of the alphabet" , "Shape resembling the twenty-second letter" , "Character" , "Angled mark or notch" , "Letter; notch shape" .)