Nationalist in routine wrangling — one has almost zero impact (8)
I believe the answer is:
neutrino
'one has almost zero impact' is the definition.
I can't tell whether this defines the answer.
'nationalist in routine wrangling' is the wordplay.
'nationalist' becomes 'n' (abbreviation in politics).
'in' indicates putting letters inside.
'wrangling' indicates an anagram (wrangle can mean to round up and organise).
'routine' anagrammed gives 'neutrio'.
'n' placed inside 'neutrio' is 'NEUTRINO'.
Can you help me to learn more?
(Other definitions for neutrino that I've seen before include "Small piece of matter" , "Uncharged elementary particle" , "Minute item lacking mass" , "Subatomic particle, now said to travel faster than light" , "Spinner" .)