... portion of stripper out in erotic performance (7)
I believe the answer is:
routine
'performance' is the definition.
(routine is a kind of performance)
'portion of stripper out in erotic' is the wordplay.
'portion of' indicates the answer is hidden within the clue.
'ROUTINE' is hidden in the letters of 'stripper out in erotic'.
(Other definitions for routine that I've seen before include "Fixed programme" , "Lacking variety" , "Nine to five?" , "Ordinary" , "Unvarying, habitual procedure" .)