"Philosophy Bites" is a website which features "podcasts of top philosophers interviewed on bite-sized topics." Dave Edmunds and Nigel Warburton seek out expert philosophers and interview them on significant topics in very short, understandable, even entertaining, --- yet scholarly --- , podcasts. Well worth listening to is this one, Derek Matravers on the background to abd problems with the current definition of art.
Go to the website here.
Or listen directly here.