Infatuation (5)
I believe the answer is:
crush
'infatuation' is the definition.
(I know that infatuation can be written as crush)
This is the entire clue.
(Other definitions for crush that I've seen before include "An infatuation with the orange drink?" , "Intense infatuation; pressing crowd" , "Deform; violently subdue (rebellion)" , "Steamroller" , "Object of infatuation" .)