Room for young children (7)
I believe the answer is:
nursery
'room for young children' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for nursery that I've seen before include "Growing environment for plants or children" , "Scene of young children or plants" , "An area of cultivation" , "Baby's room - plant centre" , "An end of some tests" .)