Sofa (in Derbyshire?) (12)
I believe the answer is:
chesterfield
(Other definitions for chesterfield that I've seen before include "He wrote, advising his son" , "Part of Derbyshire" , "Derbyshire town - sofa" , "Heretics fled (anag) -- Derbyshire town with a crooked church spire" , "Padded sofa" .)