Possible Clues:

• Limit vote rigging? It's the recurring theme!
• Musical theme composed by Violet and Tim
• Recurring literary theme
• Tim and Violet recreated theme
• Echo in written works? Check four to find it perhaps
• Line recalled verse - one to mark Bond theme
• Musical theme
• Let one in on detailed motive for recurrent theme in musical
• Recurring musical theme spoiled movie title almost
• Transferable vote limit? It's a recurring theme!