Nervous society filled with tense people unable to take sides (8)

I believe the answer is:
neutrals
'unable to take sides' is the definition.
I can't tell whether this defines the answer.
'nervous society filled with tense people' is the wordplay.
'nervous' becomes 'neural' (synonyms).
'society' becomes 's' (common abbreviation in names of organisations).
'filled with' means one lot of letters goes inside another.
'tense people' becomes 't' (I can't justify this - if you can you should give a lot more credence to this answer).
'neural'+'s'='neurals'
'neurals' enclosing 't' is 'NEUTRALS'.
Can you help me to learn more?
(Other definitions for neutrals that I've seen before include "They take no sides in a dispute" , "pale shades?" , "They take no sides in disputes" .)
