Crossword Genius

Endorse Anglo-French compact (6)

Ross

I believe the answer is:

affirm

'endorse' is the definition.
(thesaurus)

'anglo-french compact' is the wordplay.
'anglo-french' becomes 'af' (abbreviation in linguistics).
'compact' becomes 'firm' ('firm' can be similar in meaning to 'compact'**).
'af'+'firm'='AFFIRM'

(Other definitions for affirm that I've seen before include "Declare, assert" , "Verify" , "Avow or corroborate" , "Asseverate" , "Emphatically state" .)

I've seen this clue in The Guardian.
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