Unit of temperature (6)
I believe the answer is:
degree
'unit of temperature' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for degree that I've seen before include "Award conferred on a 1 across" , "Position on a scale" , "It's given to college graduates" , "Comparative amount" , "Award given to a college graduate" .)