Hint right's revamped overnight coverage... (10)
I believe the answer is:
nightshirt
'overnight coverage' is the definition.
I know that 'overnight' relates to this answer. I also know that both the answer and definition are singular nouns
'hint right's revamped' is the wordplay.
'revamped' indicates anagramming the letters.
'hint'+'rights'='hintrights'
'hintrights' anagrammed gives 'NIGHTSHIRT'.
Can you help me to learn more?
(Other definitions for nightshirt that I've seen before include "Long loose garment worn by men in bed" , "overnight coverage ..." , "Bed attire" , "Alternative to pyjamas" , "Loose garment - thin girths (anag)" .)