Second person falling for cabaret performer (8)
I believe the answer is:
stripper
'cabaret performer' is the definition.
(a stripper may perform in a cabaret)
'second person falling' is the wordplay.
'second' becomes 's' (common abbreviation).
'person falling' becomes 'tripper' (someone tripping over).
's'+'tripper'='STRIPPER'
'for' acts as a link.
(Other definitions for stripper that I've seen before include "Progressively barer performer" , "Exotic dancer" , "She barely finishes" , "Teasing performer" , "One barely entertains" .)