Singular sort of English affliction (8)
I believe the answer is:
shingles
'affliction' is the definition.
(shingles is a kind of disease)
'singular sort of english' is the wordplay.
'singular' becomes 's' (abbreviation sometimes used in dictionaries).
'sort of' indicates anagramming the letters.
'english' with letters rearranged gives 'hingles'.
's'+'hingles'='SHINGLES'
(Other definitions for shingles that I've seen before include "Viral disease causing severe neuralgia" , "Kind of roof-tiles, or painful disease with rash" , "Infection" , "Roof tiles or painful disease with rash" , "Disease related to chicken pox" .)