This historic movement had strange charms about it, possibly (8)
I believe the answer is:
chartism
'this historic movement' is the definition.
The definition suggests a singular noun which matches the answer.
'strange charms about it possibly' is the wordplay.
'strange' indicates anagramming the letters.
'about' means one lot of letters goes inside another.
'possibly' indicates anagramming the letters.
'charms' with letters rearranged gives 'charsm'.
'it' anagrammed gives 'ti'.
'charsm' placed around 'ti' is 'CHARTISM'.
'had' acts as a link.
Can you help me to learn more?
(Another definition for chartism that I've seen is " C19 parliamentary reform movement".)