Perhaps neon light at last regains flickers (5,3)
I believe the answer is:
inert gas
'perhaps neon light' is the definition.
I can't judge whether this definition defines the answer.
'at last regains flickers' is the wordplay.
'last' suggests the final letters.
'flickers' is an anagram indicator (I've seen 'flickering' mean this (I've seen this in other clues)).
The last letter of 'at' is 't'.
't'+'regains'='tregains'
'tregains' is an anagram of 'INERT GAS'.
Can you help me to learn more?
(Other definitions for inert gas that I've seen before include "Passive element in the helium group" , "provokes no reaction" , "He perhaps" , "one at the edge of a table" , "He, amongst others" .)