Hear note initially shine (7)
I believe the answer is:
glisten
'shine' is the definition.
(synonyms)
'hear note initially' is the wordplay.
I cannot really see how this works, but
'hear' could be 'listen' (I've seen this before) and 'listen' is found in the answer.
'note' could be 'g' (musical note) and 'g' is found within the answer.
This accounts for all the letters.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for glisten that I've seen before include "Shine like something wet" , "Glow from reflection" , "Shine with reflected light" , "gloss" , "Singlet (anag.); tingles (anag.)" .)