Lamb's pen-name (4)
I believe the answer is:
elia
(Other definitions for elia that I've seen before include "Pseudonym of Charles Lamb, 1775-1834" , "Charles Lamb's pen name" , "Essays of - (Charles Lamb)" , "Pen-name of essayist Charles Lamb" , "1A [SHEEPISH] part of 26 [LAMB-DA]" .)