Managed play that was poorly credited (8)
I believe the answer is:
directed
'managed play' is the definition.
'directed' can be an answer for 'managed' (directing is a kind of managing). I'm not certain of the 'play' bit.
'poorly credited' is the wordplay.
'poorly' is an anagram indicator (a poor spelling).
'credited' with letters rearranged gives 'DIRECTED'.
'that was' acts as a link.
Can you help me to learn more?
(Other definitions for directed that I've seen before include "Issued instructions or showed the way" , "Guided, superintended" , "Aimed" , "Credited with having made a film" , "charged" .)