Crossword Genius

Loyal of French writer to use blade (10)

Ross

I believe the answer is:

dependable

'loyal' is the definition.
(thesaurus)

'of french writer to use blade' is the wordplay.
'of french' becomes 'de' ('of' in French).
'writer' becomes 'pen' (something which writes).
'to use' indicates anagramming the letters.
'blade' with letters rearranged gives 'dable'.
'de'+'pen'+'dable'='DEPENDABLE'

(Another definition for dependable that I've seen is " Trustworthy, reliable".)

I've seen this clue in The Daily Express.
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