Son sadly getting half twisted in dance (5)
I believe the answer is:
salsa
'half twisted in dance' is the definition.
'salsa' can be an answer for 'dance' (type of dance). I'm unsure of the 'half twisted in' bit.
'son sadly getting' is the wordplay.
'son' becomes 's' (genealogical abbreviation for son).
'sadly' becomes 'sala' (I can't justify this - if you can you should believe this answer much more).
'getting' indicates putting letters inside.
's' placed within 'sala' is 'SALSA'.
Can you help me to learn more?
(Other definitions for salsa that I've seen before include "Chilli sauce" , "that's rather spicy!" , "Tomato relish" , "This could be hot" , "Spicy tomato sauce" .)