I have the theme(even though I am missing some of the required letters!) and 3 of the required highlighted but still a lot of emptiness in my grid!
Help please with some down in SW corner:
34a A lecturer ran away lacking dead poet's calm (7)
37a Lines removed from dictionary included "one of two lobes" (6)
40a Jock smoked in Macdonald's yard with his cows (4)