Actor Nicholas died in prison (5)
I believe the answer is:
caged
'in prison' is the definition.
(I've seen this in another clue)
'actor nicholas died' is the wordplay.
'actor nicholas' becomes 'cage' (I can't justify this - if you can you should believe this answer much more).
'died' becomes 'd' (abbreviation next to the year of someone's death).
'cage'+'d'='CAGED'
Can you help me to learn more?
(Other definitions for caged that I've seen before include "Cooped up" , "in prison" , "Shut up" , "In a zoo?" , "Confined behind bars" .)