Historic group I want to reassemble (5)

I believe the answer is:

witan

I'm a little stuck... Click here to teach me more about this clue!

'historic group' is the definition.
The definition suggests a singular noun which matches the answer.

'i want to reassemble' is the wordplay.
'to reassemble' indicates an anagram (I've seen 'reassembled' mean this).
'i'+'want'='iwant'
'iwant' with letters rearranged gives 'WITAN'.

Can you help me to learn more?

(Other definitions for witan that I've seen before include "Anglo-Saxon parliament" , "Anglo-Saxon assembly" , "Assembly of old" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app