Dr Crippen perhaps losing love for right inmate (8)

I believe the answer is:

prisoner

I'm a little stuck... Click here to teach me more about this clue!

'inmate' is the definition.
(I know that inmate can be written as prisoner)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for prisoner that I've seen before include "Senior PR (anag) - one in detention" , "Inmate doing porridge" , "The ---, cult 60s TV series" , "Hostage" , "Captive, detainee" .)

I've seen this clue in The Telegraph.

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