Nectar potentially brings sleepy state (6)
I believe the answer is:
trance
'sleepy state' is the definition.
'trance' can be an answer for 'state' (trance is a kind of state). I'm not certain of the 'sleepy' bit.
'nectar potentially' is the wordplay.
'potentially' indicates an anagram (letters have the potential to spell a new word).
'nectar' anagrammed gives 'TRANCE'.
'brings' acts as a link.
Can you help me to learn more?
(Other definitions for trance that I've seen before include "Nectar (anag)" , "Sleep-like state perhaps induced by hypnosis" , "Daze" , "Dream state" , "State of a medium in a seance" .)