In other words, pull with sex appeal (2,3)
I believe the answer is:
to wit
'in other words' is the definition.
(I've seen this in another clue)
'pull with sex appeal' is the wordplay.
'pull' becomes 'tow' (tow is a kind of pull).
'with' means one lot of letters go next to another.
'sex appeal' becomes 'it'.
'tow'+'it'='TO WIT'
(Other definitions for to wit that I've seen before include "i.e." , "Namely" , "specifically" , "That is to say" , "what to do with a broken-down car!" .)