Cool orangeade's temperature is almost cold (9)
I believe the answer is:
fantastic
'cool' is the definition.
(both can mean excellent)
'orangeade's temperature is almost cold' is the wordplay.
'orangeade's' becomes 'Fanta's' (brand of fizzy orange drink).
'temperature' becomes 't' (abbreviation).
'is almost' means to remove the last letter (most of the word but not all of it).
'cold' becomes 'icy' (similar in meaning).
'icy' with its final letter removed is 'ic'.
'fantas'+'t'+'ic'='FANTASTIC'
(Other definitions for fantastic that I've seen before include "Great!" , "Wild" , "Terrific" , "Extraordinarily good, tremendous" , "Splendid, amazing" .)