Repeated tea dance (3-3)
I believe the answer is:
cha-cha
'dance' is the definition.
(cha-cha is a kind of dance)
'repeated tea' is the subsidiary indication.
'repeated' indicates the doubling of some letters.
'tea' becomes 'cha' (cha is a type of tea).
'cha' doubled is 'chacha'.
(Other definitions for cha-cha that I've seen before include "Latin-American dance" , "Repetitive Latin American dance" , "certain steps" , "Latin American ballroom dance" , "Modern ballroom dance from Latin America" .)