Theatre figure forgets lines - not one starts to supply easy reminders (7)
I believe the answer is:
dresser
'theatre' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for dresser that I've seen before include "Sideboard; theatrical assistant" , "One who treats wounds" , "Tool for smoothing" , "Wardrobe assistant" , "One chiding" .)