Show significance of French memorandum (6)

I believe the answer is:

denote

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'show significance' is the definition.
'denote' can be an answer for 'show' (I've seen this before). I am not sure about the 'significance' bit.

'of french memorandum' is the wordplay.
'of french' becomes 'de' ('of' in French).
'memorandum' becomes 'note' (I've seen this before).
'de'+'note'='DENOTE'

Can you help me to learn more?

(Other definitions for denote that I've seen before include "Indicate, signify" , "Need to (anag) - indicate" , "Point" , "Stand as symbol for" , "Be an indication of" .)

I've seen this clue in The Irish Independent.

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