Carelessly concedes kick on wing where props go in (9*)
I believe the answer is:
Here is my best explanation:
'wing where props go in' is the definition.
I can't judge whether this definition defines the answer.
'carelessly concedes kick on' is the wordplay.
'carelessly' indicates anagramming the letters.
'kick' becomes 'k' (this could be a standard abbreviation which I don't know about).
'on' is a charade indicator (letters next to each other).
'concedes' with letters rearranged gives 'scenedoc'.
(Another definition for scene dock that I've seen is "store of set pieces?".)