Ask who in France follows English knight about (7)
I believe the answer is:
enquire
'ask' is the definition.
(synonyms)
'who in france follows english knight about' is the wordplay.
'who in france' becomes 'qui' (French for 'who').
'follows' is a charade indicator (letters next to each other).
'english' becomes 'e' (abbreviation).
'knight' becomes 'N' (chess abbreviation).
'about' becomes 're' ('re' means regarding or about).
'e'+'n'='en'
'qui' put after 'en' is 'enqui'.
'enqui'+'re'='ENQUIRE'
(Another definition for enquire that I've seen is " Ask about, seek information".)