Church having a tea dance (3-3)
I believe the answer is:
cha-cha
'dance' is the definition.
(I know that cha cha is a type of dance)
'church having a tea' is the wordplay.
'church' becomes 'ch' (common abbreviation).
'having' is a charade indicator (letters next to each other).
'tea' becomes 'cha' (cha is a type of tea).
'ch'+'a'+'cha'='CHA-CHA'
(Other definitions for cha-cha that I've seen before include "Repetitive Latin American dance" , "Latin American ballroom dance" , "Modern ballroom dance from Latin America" , "certain steps" , "Latin-American dance" .)