Made effervescent tea - dear cocktail (7)
I believe the answer is:
aerated
'made effervescent' is the definition.
(I've seen this in another clue)
'tea dear cocktail' is the wordplay.
'cocktail' is an anagram indicator.
'tea'+'dear'='teadear'
'teadear' anagrammed gives 'AERATED'.
(Other definitions for aerated that I've seen before include "Mixed with air" , "hot under the collar" , "Perturbed" , "(Of liquid) charged with gas" , "Ventilated" .)