Badly painted advertisement removed, being a bit clumsy (5)
I believe the answer is:
inept
'clumsy' is the definition.
(I know that clumsy can be written as inept)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for inept that I've seen before include "Incompetent and ineffectual" , "Not competent" , "rubbish" , "Clumsy, bumbling" , "Futile" .)