The Queen, The Office and End of Days - presumably, the insomniacs never tire of them? (8)
I believe the answer is:
bedrooms
'presumably the insomniacs never tire of them?' is the definition.
I can't judge whether this defines the answer.
'the queen the office and end of days' is the wordplay.
I cannot really understand how this works, but
'queen' could be 'r' (abbreviation for regina, e.g. in ER ) and 'r' is found within the answer.
'of' could be 'o' and 'o' is found within the answer.
'days' could be 'd' (abbreviation for days) and 'd' is present in the answer.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for bedrooms that I've seen before include "Sleeping chambers" , "Dom robes up after nights spent in them" , "Sleeping areas" , "Sleeping quarters" , "Sleeping spaces" .)