Notwithstanding abnormal speed, embraces sex (7)
I believe the answer is:
despite
'notwithstanding' is the definition.
(notwithstanding means despite or nevertheless)
'abnormal speed embraces sex' is the wordplay.
'abnormal' indicates anagramming the letters.
'embraces' is an insertion indicator.
'sex' becomes 'it' (a common euphemism).
'speed' anagrammed gives 'despe'.
'despe' going around 'it' is 'DESPITE'.
(Other definitions for despite that I've seen before include "Undeterred" , "Notwithstanding" , "Without being affected by; contempt" , "In the face" , "Regardless of, in defiance of" .)