Possible Clues:

• This might have an inclination to be something of a swan song
• ...and liking what the prisoners are singing?
• How one might have a preference for 2 down, perhaps
• Inclination one has to write books after tea
• Fondness (for) — bias (towards)
• Inclination to write repetitive song
• Fondness for a swan-song
• Liking song by writer
• Inclination to write and sing
• Liking to write slogan