Sex charge embracing sweetheart? Say again! (7)
I believe the answer is:
iterate
'say again' is the definition.
(to iterate is say something again)
'sex charge embracing sweetheart?' is the wordplay.
'sex' becomes 'it' (a common euphemism).
'charge' becomes 'rate' (rate is a kind of charge).
'embracing' means one lot of letters goes inside another.
'sweetheart?' becomes 'e' (the heart/centre of 'sweet').
'it'+'rate'='itrate'
'itrate' placed around 'e' is 'ITERATE'.
(Other definitions for iterate that I've seen before include "Repeat, state again" , "Say again, repeat" , "Recapitulate" , "Utter or perform repeatedly" , "State repeatedly, say again" .)