Glower half-way through Eugene Onegin (4)
I believe the answer is:
neon
'glower' is the definition.
(gas which glows)
'through eugene onegin' is the wordplay.
'through' indicates a hidden word.
'NEON' can be found hidden inside 'eugene onegin'.
'half-way' is the link.
This may not be correct. It may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for neon that I've seen before include "One of the six inert gases" , "Gaseous element, in advertising sign say" , "Noble gas used in illuminated signs" , "Element 10, used in lights" , "Small plant; colour" .)