Reportedly knocked down, being imperfect (6)
I believe the answer is:
flawed
'being imperfect' is the definition.
('flawed' can be similar in meaning to 'imperfect')
'reportedly knocked down' is the wordplay.
'reportedly' indicates a 'sounds like' (homophone) clue.
'knocked down' becomes 'floored' ('floor' can be a synonym of 'knock down').
'floored' sounds like 'FLAWED'.
(Other definitions for flawed that I've seen before include "Containing blemish or imperfection" , "with a hole in it" , "Having blemish or defect" , "Imperfect" , "Blemished; faulty" .)