Dancing won lady's surrender (3,4)
I believe the answer is:
lay down
'surrender' is the definition.
(thesaurus)
'dancing won lady's' is the wordplay.
'dancing' indicates an anagram.
'won'+'lady'='wonlady'
'wonlady' anagrammed gives 'LAY DOWN'.
(Other definitions for lay down that I've seen before include "Insist upon - abandon" , "Record" , "Enact or establish" .)