Lovely surprise? (9)
I believe the answer is:
bombshell
This clue is a double definition.
'lovely' is the first definition.
(bombshell can mean an attractive woman)
'surprise?' is the second definition.
(bombshell is a kind of surprise)
(Other definitions for bombshell that I've seen before include "Terrible shock" , "Thunderbolt, shocking surprise" , "Sudden and surprising piece of news" , "Overwhelming surprise" , "attractive blonde" .)