Student's room (3)
I believe the answer is:
den
'room' is the definition.
(I know that den is a type of room)
'student's' is the wordplay.
'DEN' is hidden in amongst the letters.
However, I am uncertain how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for den that I've seen before include "Room for work or play" , "Animal's lair or gent's study" , "Hideaway" , "Miserable place" , "Animal shelter" .)