Most elegant farm animal is French (7)
I believe the answer is:
neatest
'most elegant' is the definition.
('neat' can be similar in meaning to 'elegant')
'farm animal is french' is the wordplay.
'farm animal' becomes 'neat' (I have seen 'Bovine animal ' mean 'neat' so perhaps 'animal' could also mean 'neat'. I am not sure about the 'farm' bit.).
'is french' becomes 'est' (I've seen this in other clues).
'neat'+'est'='NEATEST'
Can you help me to learn more?
(Other definitions for neatest that I've seen before include "Most tidy" , "Most orderly" , "Most smart" , "best-looking desk, say?" , "Seat ten (anag)" .)