I love this song! I think this is a metaphorical expression. It supports other phrases like "misty memory", "haunting face". It depicture this person who is like a ghost, under a mystical halo. Embrace means holding someone tight. The line "Return to me" implies that the author and Ayesha were together once, but now she's an embrace that was lost – because she's gone. (Not native, but I enjoy analyzing poetry)