You may not remember resting therein (3)
I believe the answer is:
cot
'you' is the definition.
Both the definition and answer are singular nouns.
Perhaps there's a link between them I don't understand?
'not remember resting therein' is the wordplay.
I cannot quite understand how this works, but
'not' could be 'o' (I've seen this in other clues) and 'o' is found in the answer.
The remaining letters 'ct' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
'may' is the link.
Can you help me to learn more?
(Other definitions for cot that I've seen before include "Baby bed" , "Camp bed" , "Small boat to hold a baby" , "Small bed with high sides" , "Crib" .)