Two short blokes dance (3-3)
I believe the answer is:
cha-cha
'dance' is the definition.
(I know that cha-cha is a type of dance)
'two short blokes' is the wordplay.
'two' indicates the doubling of some letters.
'short blokes' becomes 'cha' (I can't explain this - if you can you should give a lot more credence to this answer).
'cha' doubled is 'CHA-CHA'.
Can you help me to learn more?
(Other definitions for cha-cha that I've seen before include "Latin American ballroom dance" , "certain steps" , "Repetitive Latin American dance" , "Latin-American dance" , "Modern ballroom dance from Latin America" .)