Segregate schoolchildren within places where they can board (5)
I believe the answer is:
gates
'places where they can board' is the definition.
The definition suggests an adverb but the answer is not.
'segregate schoolchildren within' is the wordplay.
'within' indicates the answer is hidden within the clue.
'GATES' can be found hidden inside 'segregate schoolchildren'.
Can you help me to learn more?
(Other definitions for gates that I've seen before include "Entrances (for Bill?)" , "Moveable barriers" , "One of the founders of Microsoft" , "Billionaire Bill - openers" , "Billionaire computer entrepreneur" .)