Fasten nightie? Nowhere near! (3)
I believe the answer is:
tie
'fasten' is the definition.
(tying is a kind of fastening)
'nightie? nowhere near' is the wordplay.
'TIE' is hidden within the letters.
But, I am unsure how the hidden word is indicated.
Can you help me to learn more?
(Other definitions for tie that I've seen before include "Bond > girl wearing this? Unlikely" , "Drawn score" , "Level result" , "Neck attire" , "Fasten; draw" .)