Where to sleep if you are at a dead end (3)
I believe the answer is:
bed
'where to sleep' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'you are at a dead end' is the wordplay.
'you are' becomes 'be' (I can't justify this - if you can you should believe this answer much more).
'at' says to put letters next to each other.
'end' suggests the final letters.
The final letter of 'dead' is 'd'.
'be'+'d'='BED'
'if' acts as a link.
Can you help me to learn more?
(Other definitions for bed that I've seen before include "Place for patient in hospital" , "Couch" , "Divan" , "e.g. Four-poster" , "One with flower, sleeper, in" .)