Restricting sodium, scribbled a blue line which cannot be removed (11)

I believe the answer is:

unalienable

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'cannot be removed' is the definition.
I can't judge whether this definition defines the answer.

'restricting sodium scribbled a blue line' is the wordplay.
'restricting' is an insertion indicator.
'sodium' becomes 'Na' (chemical symbol).
'scribbled' is an anagram indicator (ie written badly).
'a'+'blue'+'line'='ablueline'
'ablueline' is an anagram of 'ulienable'.
'na' going within 'ulienable' is 'UNALIENABLE'.

'which' acts as a link.

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