Plan clues entangled in concept of linear algebra (4-5)

I believe the answer is:

null-space

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'concept of linear algebra' is the definition.
I know nothing about this answer so I can't tell whether this works.

'plan clues entangled' is the wordplay.
'entangled' indicates an anagram.
'plan'+'clues'='planclues'
'planclues' anagrammed gives 'NULL-SPACE'.

'in' is the link.

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