Amazing soft drinks, Tango I see (9)
I believe the answer is:
fantastic
'amazing' is the definition.
(I've seen this before)
'soft drinks tango i see' is the wordplay.
'soft drinks' becomes 'Fantas' (Fanta is a brand of soft drink).
'tango' becomes 'T' (phonetic alphabet: alpha, bravo, charlie etc.).
'see' becomes 'C' (the word for the letter, according to Chambers).
'fantas'+'t'+'i'+'c'='FANTASTIC'
(Other definitions for fantastic that I've seen before include "Super!" , "Fanciful" , "Weird" , "Illusory - excellent!" , "Extraordinarily good, tremendous" .)