Crossword Genius

Kidnapped person and entertainer get on (7)

Ross

I believe the answer is:

hostage

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'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" .)

I've seen this clue in The Sun.
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