Easy shot has left republican to shine (7)

I believe the answer is:

glimmer

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'to shine' is the definition.
(thesaurus)

'easy shot has left republican' is the wordplay.
'easy shot' becomes 'gimme' (I can't justify this - if you can you should give a lot more credence to this answer).
'has' means one lot of letters goes inside another.
'left' becomes 'l' (common abbreviation).
'republican' becomes 'R' (abbreviation in US politics).
'gimme' going around 'l' is 'glimme'.
'glimme'+'r'='GLIMMER'

Can you help me to learn more?

(Other definitions for glimmer that I've seen before include "Gleam faintly, like candle in dark" , "Shine faintly with a wavering light" , "Faint glow" , "Small bit of light" , "Intimation (of hope?)" .)

I've seen this clue in The Daily Express.

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