Mistake, second bachelor turning to lass for dance (8)
I believe the answer is:
boogaloo
'dance' is the definition.
(thesaurus)
'mistake second bachelor turning to lass' is the wordplay.
I cannot really see how this works, but
'second' could be 'b' (B can mean second eg B-side) and 'b' is located in the answer.
'lass' could be 'gal' (I've seen this in other clues) and 'gal' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'for' is the link.
Can you help me to learn more?
(Other definitions for boogaloo that I've seen before include "Nineteen-sixties dance" , "dance, 60s style" .)