Tiny thing in creel not moving (8)
I believe the answer is:
electron
'tiny thing' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.
'creel not moving' is the wordplay.
'moving' is an anagram indicator.
'creel'+'not'='creelnot'
'creelnot' is an anagram of 'ELECTRON'.
'in' is the link.
Can you help me to learn more?
(Other definitions for electron that I've seen before include "Tiny bit of power" , "Part of atom" , "Subatomic particle involved in conduction" , "In small part" , "Subatomic particle -- enrol etc (anag)" .)