Possible Clues:

• Divine in the distance summit that’s not too demanding
• Culturally deficient person taking book aboard Central Line?
• Not very cerebral Lib Dem playing with words, briefly
• Theologian in race to get basic, opening argument that's moderately challenging
• Regarded as only moderately intellectual
• Not too intellectually stretching
• Centre of stalls is home to bishop without elevated tastes
• Run into bend beyond central area? It's not unduly demanding
• Lib Dem row breaks out over duke — not taxing very much
• Cliff pursuing hit ideally neither intellectual nor downmarket