Kidnapped person and entertainer get on (7)
I believe the answer is:
hostage
'kidnapped person and' is the definition.
I can't tell whether this definition defines the answer.
'entertainer get on' is the wordplay.
'entertainer' becomes 'host' (person hosting or entertaining guests).
'get on' becomes 'age' (synonyms).
'host'+'age'='HOSTAGE'
Can you help me to learn more?
(Other definitions for hostage that I've seen before include "Person held by kidnapper for ransom" , "Prisoner - pawn" , "Person taken as security" , "One held captive" , "Captive held for ransom" .)