Possible Clues:

• Eng. Lit. ref.
• Lit light?
• Oft-quoted auth.
• Source of many dramatic quotes: Abbr
• Literary citation abbr
• Frequent quotation attribution: Abbr
• Common quote tag
• Common English lit subj
• Often-seen abbr. in English drama
• Source of the phrases 'cakes and ale' and 'milk of human kindness': Abbr