Mercenary lover puts one off holding dance (10)
I believe the answer is:
'puts one off holding dance' is the definition.
I can't judge whether this defines the answer.
'mercenary lover' is the wordplay.
'mercenary' becomes 'freelance' (synonyms).
'lover' becomes 'r' (I can't explain this - if you can you should believe this answer much more).
Can you help me to learn more?
(Other definitions for freelancer that I've seen before include "One temporarily hired" , "Independent worker" , "Self-employed person" .)