Desire heterosexual embraces (4)
I believe the answer is:
eros
'desire' is the definition.
(thesaurus)
'heterosexual embraces' is the wordplay.
'embraces' indicates the answer is hidden within the clue (I've seen 'embraced' mean this).
'EROS' is hidden in the letters of 'heterosexual'.
(Other definitions for eros that I've seen before include "Winged god of love" , "Greek love-god" , "Famous statue in Piccadilly, London" , "Cupid, to the Greeks" , "Arrow-shooting god" .)