Author's online work taken up? (3)
I believe the answer is:
poe
'author's' is the definition.
(Edgar Allan Poe)
'online work taken up?' is the wordplay.
'online' becomes 'e' (as in e-mail or e-commerce).
'work' becomes 'op' (abbreviation for opus).
'taken up?' shows that the letters should be reversed in order.
'e'+'op'='eop'
'eop' reversed gives 'POE'.
(Other definitions for poe that I've seen before include "Name of writer" , "Entrance rooms; seeks support from" , "Edgar Allan --, US writer" , "American author, d. 1849" , "Edgar Allen, great American writer of eerie stories" .)