Christobel is killed, pierced by a dagger (7)
I believe the answer is:
obelisk
'dagger' is the definition.
(synonyms)
'christobel is killed pierced by a' is the wordplay.
'OBELISK' is hidden in amongst the letters.
But, I'm unsure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for obelisk that I've seen before include "Kind of monument, tall sloping pillar" , "Stone pillar tapering towards a point" , "Monument with four sides and tapering top" , "Tapering pillar erected as monument" , "Monument with tall pillar and tapering top" .)