He goes to the end of the room (3)
I believe the answer is:
tom
'he goes' is the definition.
The answer is a person as well as being a singular noun. This is suggested by the definition.
'to the end of the room' is the wordplay.
'the end of' says to take the final letters.
The final letter of 'room' is 'm'.
'to'+'m'='TOM'
Can you help me to learn more?
(Other definitions for tom that I've seen before include "- Lehrer, US humorist" , "Man's name; male cat" , "type pursuing queen" , "queen's consort?" , "famous schoolboy" .)