Gelato blended smoothly (6)
I believe the answer is:
legato
'smoothly' is the definition.
(I've seen this in another clue)
'gelato blended' is the wordplay.
'blended' indicates an anagram.
'gelato' is an anagram of 'LEGATO'.
(Other definitions for legato that I've seen before include "with smooth execution" , "Smoothly, musically speaking" , "Don't play roughly" , "Musically smooth" , "Smooth, flowing (mus.)" .)