A sign the French love (3)
I believe the answer is:
leo
'a sign' is the definition.
(star sign)
'the french love' is the wordplay.
'the french' becomes 'le' ().
'love' becomes 'o' (In tennis, 'love' means 'zero').
'le'+'o'='LEO'
(Other definitions for leo that I've seen before include "Cancer, ___, Virgo" , "Fifth sign of the zodiac" , "Name taken by 13 popes, the last dying in 1903 aged 93" , "Zodiacal lion" , "Lion sign of the Zodiac" .)