Clumsy writer held up by computer technology (5)
I believe the answer is:
inept
'clumsy' is the definition.
('inept' can be a synonym of 'clumsy')
I don't understand how the rest of the clue works.
(Other definitions for inept that I've seen before include "Showing a lack of competence" , "Useless, awkward" , "Absurd or unskilful" , "Silly - unskilled - unsuitable" , "Cack-handed" .)