Complex sentence: Hardy has been a significant influence on Nigel Blackwell, frontman of the post-punk British rock band Half Man Half Biscuit, who has often incorporated phrases (some obscure) by or about Hardy, into his song lyrics.
Split into simpler sentences: Hardy has been a major cultural influence on Nigel Blackwell, frontman of the post-punk British rock band Half Man Half Biscuit. Blackwell has often incorporated phrases by or about Hardy, sometimes very obscure, into his song lyrics.