Document in which there will be no cross-references (8)

I believe the answer is:

pedigree

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'document in which there will be no cross-references' is the definition.
Although both the answer and definition are singular nouns, I can't understand how one could define the other.

This is all the clue.

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(Other definitions for pedigree that I've seen before include "High-class" , "Pure-bred animal's line of descent" , "Of animals, recorded line of descent" , "Blood line" , "Record of descent" .)

I've seen this clue in the Evening Standard.

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